title: Why is swagger validator failing here
body: <p>I can't seem to figure out why swagger validation is failing</p>
  
  <p>What is strange is that if I add more than one path the validation only complains about the last one. Then if I remove the last one it starts complaining about the one above it.</p>
  
  <p>When working in the swagger editor then it all seems to validate.</p>
  
  <p>The swagger document is as follows:</p>
  
  <pre><code>{
     "swagger":"2.0",
     "info":{
        "version":"0.0.1",
        "title":"Bla API"
     },
     "schemes":[
        "https"
     ],
     "produces":[
        "application/json"
     ],
     "host":"rest.bla.com",
     "basePath":"/api/v2/fleet",
     "paths":{
        "/{organisation_id}/access_groups":{
           "get":{
              "tags":[
                 "Access Group"
              ],
              "summary":"Get access groups\n",
              "description":"Gets a list of 'access_group' objects based on the provided search criteria\n",
              "parameters":[
                 {
                    "in":"path",
                    "name":"organisation_id",
                    "required":"true",
                    "type":"string"
                 },
                 {
                    "name":"term",
                    "in":"query",
                    "required":"false",
                    "type":"string"
                 },
                 {
                    "name":"take",
                    "in":"query",
                    "required":"true",
                    "type":"integer",
                    "format":"int32"
                 },
                 {
                    "name":"skip",
                    "in":"query",
                    "type":"integer",
                    "format":"int32",
                    "required":"true"
                 },
                 {
                    "name":"order",
                    "in":"query",
                    "type":"string"
                 }
              ],
              "responses":{
                 "403":{
                    "description":"Permission Denied",
                    "schema":{
                       "$ref":"#/definitions/error"
                    }
                 },
                 "200":{
                    "description":"OK",
                    "schema":{
                       "type":"object",
                       "properties":{
                          "data":{
                             "type":"array",
                             "items":{
                                "$ref":"#/definitions/access-group-response"
                             }
                          },
                          "pagination":{
                             "$ref":"#/definitions/pagination"
                          }
                       }
                    }
                 }
              }
           }
        }
     },
     "definitions":{
        "access-group":{
           "description":"an object which provides the ability to grant access to specific assets\n",
           "properties":{
              "name":{
                 "type":"string"
              }
           }
        },
        "access-group-response":{
           "properties":{
              "data":{
                 "$ref":"#/definitions/access-group"
              },
              "links":{
                 "type":"array",
                 "items":{
                    "$ref":"#/definitions/link"
                 }
              }
           }
        },
        "error":{
           "type":"array",
           "items":{
              "type":"object",
              "properties":{
                 "type":{
                    "type":"string"
                 },
                 "code":{
                    "type":"string"
                 },
                 "message":{
                    "type":"string"
                 },
                 "key":{
                    "type":"string"
                 }
              }
           }
        },
        "link":{
           "properties":{
              "href":{
                 "type":"string"
              },
              "rel":{
                 "type":"string"
              }
           }
        },
        "pagination":{
           "properties":{
              "page":{
                 "type":"number",
                 "format":"int32"
              },
              "total":{
                 "type":"number",
                 "format":"int32"
              }
           }
        }
     }
  }
  </code></pre>
  
  <p>while the validation error is as follows:</p>
  
  <pre><code>{
     "schemaValidationMessages":[
        {
           "level":"error",
           "domain":"validation",
           "keyword":"oneOf",
           "message":"instance failed to match exactly one schema (matched 0 out of 2)",
           "schema":{
              "loadingURI":"http://swagger.io/v2/schema.json#",
              "pointer":"/definitions/parametersList/items"
           },
           "instance":{
              "pointer":"/paths/~1{organisation_id}~1access_groups/get/parameters/0"
           }
        },
        {
           "level":"error",
           "domain":"validation",
           "keyword":"oneOf",
           "message":"instance failed to match exactly one schema (matched 0 out of 2)",
           "schema":{
              "loadingURI":"http://swagger.io/v2/schema.json#",
              "pointer":"/definitions/parametersList/items"
           },
           "instance":{
              "pointer":"/paths/~1{organisation_id}~1access_groups/get/parameters/1"
           }
        },
        {
           "level":"error",
           "domain":"validation",
           "keyword":"oneOf",
           "message":"instance failed to match exactly one schema (matched 0 out of 2)",
           "schema":{
              "loadingURI":"http://swagger.io/v2/schema.json#",
              "pointer":"/definitions/parametersList/items"
           },
           "instance":{
              "pointer":"/paths/~1{organisation_id}~1access_groups/get/parameters/2"
           }
        },
        {
           "level":"error",
           "domain":"validation",
           "keyword":"oneOf",
           "message":"instance failed to match exactly one schema (matched 0 out of 2)",
           "schema":{
              "loadingURI":"http://swagger.io/v2/schema.json#",
              "pointer":"/definitions/parametersList/items"
           },
           "instance":{
              "pointer":"/paths/~1{organisation_id}~1access_groups/get/parameters/3"
           }
        }
     ]
  }
  </code></pre>