Thanks Romain for the help!!
I have added below property to Hue safety valve. After that I restarted for the changes to refelect. But even after restart, user login authentication is going through Local DB but not Kerberos. Are there any other changes that I need to specify so that user authentication in Hue UI uses Kerberos.
Yes. I did logged out and tried to login using Kerberos credentials it is failing. But when I tried using local DB credentials it went through successfully.