aaa: attach_user_to_role: rename parameters to match product conventions
aaa: attach_user_to_role: rename parameters to match product conventions

Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=1262604
Change-Id: I7e39a760f8d4dda9ceb28eeb584009486cb0f997
Signed-off-by: Alon Bar-Lev <2e3ceb4d37adc6ae3ccc00d3646e0e0a036ace03@redhat.com>

OpenUniversity/ovirt-engine,OpenUniversity/ovirt-engine,OpenUniversity/ovirt-engine,OpenUniversity/ovirt-engine,OpenUniversity/ovirt-engine