message: Add default values in Rest schema
  Allow update mobile data if no mobileToken
diff: "$ref": "user#/definitions/id"
  },
  "mobileToken": {
  - "$ref": "user#/definitions/mobileToken"
  + "$ref": "user#/definitions/mobileToken",
  + "default": ""
  },
  "mobileOS": {
  "$ref": "user#/definitions/mobileOS"
  },
  "mobileBundleID": {
  - "$ref": "user#/definitions/mobileBundleID"
  + "$ref": "user#/definitions/mobileBundleID",
  + "default": ""
  },
  "mobileAppName": {
  - "$ref": "user#/definitions/mobileAppName"
  + "$ref": "user#/definitions/mobileAppName",
  + "default": ""
  },
  "mobileVersion": {
  - "$ref": "user#/definitions/mobileVersion"
  + "$ref": "user#/definitions/mobileVersion",
  + "default": ""
  }
  },
  "required": [
  - "id",
  - "mobileToken"
  + "id"
  ]
  }
  