Fix $ref serialization errors for requestBodies and responses

[millicentachieng]

Fixes #1000

This PR

• Converts ref requestBodies to ref parameters in v2 serialization
• Adds consumes and produces properties when there are ref requestBodies and responses in v2 serialization

Example with ref Request Body

paths:
    '/Documents({Id})/Revisions/$ref':
        post:
          tags:
            - Documents.RevisionDto
          summary: Create new navigation property ref to Revisions for Documents
          operationId: Documents.CreateRefRevisions
-       consumes: [ ]
+       consumes: 
+            - application/json
        parameters:
            - in: path
              name: Id
              description: 'key: Id of DocumentDto'
              required: true
              type: integer
              format: int32
              maximum: 2147483647
              minimum: -2147483648
              x-ms-docs-key-type: DocumentDto
-        - in: body
-            name: body
-            schema: { }
+        - $ref: '#/parameters/refPostBody'
        responses:
            '204':
              description: Success
            default:
              $ref: '#/responses/error'
         x-ms-docs-operation-type: operation
parameters:
+  refPostBody:
+    in: body
+    name: body
+    description: New navigation property ref value
+    required: true
+    schema:
+      $ref: '#/definitions/ReferenceCreate'

Example with ref Response

paths:
    '/Tasks({Id})/Default.Upload':
        post:
          tags:
            - Tasks.Actions
          summary: Invoke action Upload
          operationId: Tasks.DocumentDto.Upload
+          produces:
+            - application/json
          parameters:
            - in: path
              name: Id
              description: 'key: Id of DocumentDto'
              required: true
              type: integer
              format: int32
              maximum: 2147483647
              minimum: -2147483648
              x-ms-docs-key-type: DocumentDto
          responses:
            '200':
              $ref: '#/responses/UploadResponse'
            default:
              $ref: '#/responses/error'
          x-ms-docs-operation-type: action
        x-description: Provides operations to call the Upload method.
responses:
    UploadResponse:
        description: Success
        schema:
          $ref: '#/definitions/Siterra.Documents.App.DTO.DocumentDto'