message: Make the originGroup in OriginGroupOverride a resourcereference instead of a string
diff: ]
  },
  "originGroup": {
  - "description": "Origin Group from where the content will be fetched from when CDN does not have it",
  - "type": "string"
  + "description": "A reference to the origin group from where the content will be fetched from when CDN does not have it",
  + "type": "object",
  + "$ref": "#/definitions/ResourceReference"
  }
  }
  },
  