title: why does my swagger-server generate errors?
body: <p>I got following errors about the swagger yaml when starting index.js in nodejs-server from "Generate Server" on Swagger Editor.</p>
  
  <pre><code>    #/paths/~1botManagement~1deleteScenario~1/delete/parameters/2: Not a valid parameter definition
      #/paths/~1botManagement~1deleteScenario~1/delete/parameters/2: Not a valid parameter definition
        #: Missing required property: schema
        #: Missing required property: type
      #/paths/~1botManagement~1deleteScenario~1/delete/parameters/2: Missing required property: $ref
    #/paths/~1botManagement~1deleteScenario~1/delete/parameters/1: Not a valid parameter definition
      #/paths/~1botManagement~1deleteScenario~1/delete/parameters/1: Not a valid parameter definition
        #: Missing required property: schema
        #: Missing required property: type
      #/paths/~1botManagement~1deleteScenario~1/delete/parameters/1: Missing required property: $ref
    #/paths/~1botManagement~1deleteScenario~1/delete/parameters/0: Not a valid parameter definition
      #/paths/~1botManagement~1deleteScenario~1/delete/parameters/0: Not a valid parameter definition
        #: Missing required property: schema
        #: Missing required property: type
      #/paths/~1botManagement~1deleteScenario~1/delete/parameters/0: Missing required property: $ref
    #/paths/~1botManagement~1stopScenario~1/post/parameters/2: Not a valid parameter definition
      #/paths/~1botManagement~1stopScenario~1/post/parameters/2: Not a valid parameter definition
        #: Missing required property: schema
        #: Missing required property: type
      #/paths/~1botManagement~1stopScenario~1/post/parameters/2: Missing required property: $ref
    #/paths/~1botManagement~1stopScenario~1/post/parameters/1: Not a valid parameter definition
      #/paths/~1botManagement~1stopScenario~1/post/parameters/1: Not a valid parameter definition
        #: Missing required property: schema
        #: Missing required property: type
      #/paths/~1botManagement~1stopScenario~1/post/parameters/1: Missing required property: $ref
    #/paths/~1botManagement~1stopScenario~1/post/parameters/0: Not a valid parameter definition
      #/paths/~1botManagement~1stopScenario~1/post/parameters/0: Not a valid parameter definition
        #: Missing required property: schema
        #: Missing required property: type
      #/paths/~1botManagement~1stopScenario~1/post/parameters/0: Missing required property: $ref
    #/paths/~1botManagement~1restartScenario~1/post/parameters/2: Not a valid parameter definition
      #/paths/~1botManagement~1restartScenario~1/post/parameters/2: Not a valid parameter definition
        #: Missing required property: schema
        #: Missing required property: type
      #/paths/~1botManagement~1restartScenario~1/post/parameters/2: Missing required property: $ref
    #/paths/~1botManagement~1restartScenario~1/post/parameters/1: Not a valid parameter definition
      #/paths/~1botManagement~1restartScenario~1/post/parameters/1: Not a valid parameter definition
        #: Missing required property: schema
        #: Missing required property: type
      #/paths/~1botManagement~1restartScenario~1/post/parameters/1: Missing required property: $ref
    #/paths/~1botManagement~1restartScenario~1/post/parameters/0: Not a valid parameter definition
      #/paths/~1botManagement~1restartScenario~1/post/parameters/0: Not a valid parameter definition
        #: Missing required property: schema
        #: Missing required property: type
      #/paths/~1botManagement~1restartScenario~1/post/parameters/0: Missing required property: $ref
    #/paths/~1botManagement~1startScenario~1/post/parameters/2: Not a valid parameter definition
      #/paths/~1botManagement~1startScenario~1/post/parameters/2: Not a valid parameter definition
        #: Missing required property: schema
        #: Missing required property: type
      #/paths/~1botManagement~1startScenario~1/post/parameters/2: Missing required property: $ref
    #/paths/~1botManagement~1startScenario~1/post/parameters/1: Not a valid parameter definition
      #/paths/~1botManagement~1startScenario~1/post/parameters/1: Not a valid parameter definition
        #: Missing required property: schema
        #: Missing required property: type
      #/paths/~1botManagement~1startScenario~1/post/parameters/1: Missing required property: $ref
    #/paths/~1botManagement~1startScenario~1/post/parameters/0: Not a valid parameter definition
      #/paths/~1botManagement~1startScenario~1/post/parameters/0: Not a valid parameter definition
        #: Missing required property: schema
        #: Missing required property: type
      #/paths/~1botManagement~1startScenario~1/post/parameters/0: Missing required property: $ref
  </code></pre>
  
  <p>yaml file is below.</p>
  
  <pre><code>swagger: "2.0"
  info:
    description: I wrote something but can't describe it.
    version: 1
    title: I wrote something but can't describe it.
    termOfService: I wrote something but can't describe it.
    contact:
      email: xxxx@xxxx
    license:
      name: Apache 2.0
      url: http://www.apache.org/licenses/LICENSE-2.0.html
  host: xxxx.xxxx.xxxx.xxxx
  basePath: /v1
  tags:
    - name: I wrote something but can't describe it.
  schemes:
    - https
  paths:
    /XXXXXXXXXX:
      get:
        summary: I wrote something but can't describe it.
        description: I wrote something but can't describe it.
        responses:
          200:
            description: Successful response
            schema:
              type: object
              properties:
                pid:
                  type: integer
                  format: int64
                  example: 0
                name:
                  type: string
                  example: sample
                pm2_env:
                  type: object
                  example: {username:sample, windowsHide:true...}
                pm_id:
                  type: integer
                  format: int64
                  example: 0
                monit:
                  type: object
                  example: {memory:0, cpu:0}
          404:
            description: API not found
          500:
            description: Internal server error
  
    /xxxxx/xxxxx:
      post:
        summary: I wrote something but can't describe it.
        description: I wrote something but can't describe it.
        parameters:
          - name: xxxxx
            in: formData
            description: I wrote something but can't describe it.
            required: true
            type: string
          - name: xxxxx
            in: formData
            description: I wrote something but can't describe it.
            required: false
            type: string
          - name: xxxxx
            in: formData
            description: I wrote something but can't describe it.
            required: false
            type: string
        responses:
          200:
            description: Successful response
            schema:
              type: object
              properties:
                scenario:
                  type: string
                  example: sample.js
                status:
                  type: string
                  example: I wrote something but can't describe it.
          400:
            description: I wrote something but can't describe it.
          404:
            description: "API not found"
          500:
            description: "Internal server error"
  
    /xxxxx/xxxxx/:
      post:
        summary: I wrote something but can't describe it.
        description:
            I wrote something but can't describe it.
        parameters:
          - name: xxxxx
            in: formData
            description: I wrote something but can't describe it.
            required: true
            type: string
          - name: xxxxx
            in: formData
            description: I wrote something but can't describe it.
            required: false
            type: string
          - name: xxxxx
            in: formData
            description: I wrote something but can't describe it.
            required: false
            type: string
        responses:
          200:
            description: Successful response
            schema:
              type: object
              properties:
                scenario:
                  type: string
                  example: sample.js
                status:
                  type: string
                  example: I wrote something but can't describe it.
          400:
            description: Bad request
          404:
            description: API not found
          500:
            description: Internal server error
  
    /xxxxx/xxxxx/:
      post:
        summary: I wrote something but can't describe it.
        description:
            I wrote something but can't describe it.
        parameters:
          - name: xxxxx
            in: formData
            description: I wrote something but can't describe it.
            required: true
            type: string
          - name: xxxxx
            in: formData
            description: I wrote something but can't describe it.
            required: false
            type: string
          - name: xxxxx
            in: formData
            description: I wrote something but can't describe it.
            required: false
            type: string
        responses:
          200:
            description: Successful response
            schema:
              type: object
              properties:
                scenario:
                  type: string
                  example: sample.js
                status:
                  type: string
                  example: I wrote something but can't describe it.
          400:
            description: Bad request
          404:
            description: API not found
          500:
            description: Internal server error
  
    /xxxxx/xxxxx/:
      delete:
        summary: I wrote something but can't describe it.
        description:
            I wrote something but can't describe it.
        parameters:
          - name: xxxxx
            in: formData
            description: I wrote something but can't describe it.
            required: true
            type: string
          - name: xxxxx
            in: formData
            description: I wrote something but can't describe it.
            required: false
            type: string
          - name: xxxxx
            in: formData
            description: I wrote something but can't describe it.
            required: false
            type: string
        responses:
          200:
            description: Successful response
            schema:
              type: object
              properties:
                scenario:
                  type: string
                  example: sample.js
                status:
                  type: string
                  example: I wrote something but can't describe it.
          400:
            description: Bad request
          404:
            description: API not found
          500:
            description: Internal server error
  </code></pre>
  
  <p>It looks the missing property of "$ref".
  I know what this property is used. But I don't need any reference to other docs.
  In this case, how can I solve this problems?</p>