message: [DataFactory] Add new features to Swagger
  * Add new features
  1. SecureOutput and BatchCount
  2. Filter Activity
  3. LInked Service Parameters
  4. FilterActivity
  * Fix indentations
  * Fix review comments
diff: "Int",
  "Float",
  "Bool",
  - "Array"
  + "Array",
  + "SecureString"
  ],
  "x-ms-enum": {
  "name": "ParameterType",
  "referenceName": {
  "type": "string",
  "description": "Reference LinkedService name."
  + },
  + "parameters": {
  + "$ref": "#/definitions/ParameterValueSpecification",
  + "description": "Arguments for LinkedService."
  }
  },
  "required": [
  