SwaggerParser can't parse an array with allOf

[dentych]

SwaggerParser is having troubles deserializing a definition that is of type array, and includes an allOf.

Example here:

swagger: "2.0"
info:
  description: "Stupid API"
  version: "1.0.0"
  title: "Swagger API"
host: "localhost"
basePath: "/"
schemes:
  - "http"
paths:
  '/what':
    get:
      summary: ok
      responses:
        200:
          description: "Success"
          schema:
            $ref: '#/definitions/AllOfArray'
definitions:
  Obj1:
    type: object
    properties:
      prop1:
        type: string
  AllOfArray:
    type: array
    items:
      allOf:
        - $ref: "#/definitions/Obj1"
        - properties:
            prop:
              type: string

The result is that AllOfArray comes out as an ArrayModel with no items.

[gracekarina]

related to #567