message: fixing eTag issues
diff: "discriminator": "kind",
  "allOf": [
  {
  - "$ref": "#/definitions/Resource"
  + "$ref": "#/definitions/ProxyResource"
  }
  ],
  "properties": {
  "description": "Is charge Invoiced",
  "type": "boolean",
  "readOnly": true
  + },
  + "subscriptionId": {
  + "description": "Subscription guid.",
  + "type": "string",
  + "readOnly": true
  }
  }
  },
  