Support parsing of methods with parameters

[giacomodeliberali]

Suppose I have a yaml containing something like this:

...
paths:
  "/users/{id}":
    parameters:
    - in: path
      name: id
      description: The user identifier
      required: true
      type: integer
    get:
      operationId: getUserById
      summary: Return the user specified by its identifier
      responses:
        '200':
          description: The requested user
          schema:
            "$ref": "#/definitions/User"
        '400':
          description: Bad Request
        '401':
          description: Unauthorized
        '403':
          description: Forbidden
...

Since in the blueprints.py the code is looping though all methds, it finds also the parameters property at the same depth of get, and it gets included in ops object, casuing the model validation to fail running pytest.