message: Updated UserMetadata description.
diff: },
  "userMetadata": {
  "type": "string",
  - "description": "The user metadata is stored in String format with maximum length of 1024."
  + "description": "Usermetadata is a placeholder to store user-defined string data with maximum length 1024. e.g. it can be used to store descriptive data, such as list of teams and their contact information also user-defined configuration settings can be stored."
  }
  },
  "description": "Description of a Consumer Group properties."
  