aaa: Get users by domain returns partial list of users

Only partial list of users is returned when querying domain users

Change-Id: Ie4c121b0edd6966c518b46aa8e98c24be6cb74c8
Topic: AAA
Bug-Url: https://bugzilla.redhat.com/1121410
Signed-off-by: Ravi Nori <rnori@redhat.com>