Title: #202: T3315 infopipe group users master
The issue was that getent shows user test_user in test_group, but dbus call doesn't.
How I did it is described in my description. But I don't know if it is still valid. It
was some time ago.
If I understand others comments right, it was try to fix method
See the full comment at https://github.com/SSSD/sssd/pull/202#issuecomment-318345349