Ambari 2.4 with HDF management pack Ranger Service page : Domain Name(Only for AD)

This Jira issue is for Ambari 2.4 with HDF management pack.
Please feel free to change to the right project/component.
While testing HDF 2.0 deployment using Ambari GUI, need to add Ranger service.
In the Customize Service page of Ranger, in the "Advance" tab of Ranger Service, there is one mandatory field called "Domain Name(Only for AD)".
The GUI automation test breaks due to this field.
1. Is this a new feature?
2. For internal testing, what should be the right value for this field?
Screenshot is attached.