message: add xms-ids for migrate
diff: "items": {
  "$ref": "#/definitions/CloudErrorBody"
  },
  + "x-ms-identifiers": [
  + "code"
  + ],
  "description": "A list of additional details about the error."
  }
  },
  "readOnly": true,
  "items": {
  "$ref": "#/definitions/VmFamily"
  - }
  + },
  + "x-ms-identifiers": [
  + "familyName"
  + ]
  },
  "reservedInstanceVmFamilies": {
  "type": "array",
  "description": "List of operations.",
  "items": {
  "$ref": "#/definitions/Operation"
  - }
  + },
  + "x-ms-identifiers": [
  + "name"
  + ]
  }
  }
  },
  