webadmin: Group 'user name' should be empty value In column 'user name' in user tab.

For groups the user name should be empty
in the User main tab

Change-Id: I56bcdc0615da3e423412b236f5164f7dc0a436ce
Bug-Url: https://bugzilla.redhat.com/1087498
Signed-off-by: Ravi Nori <rnori@redhat.com>