Fix the wrong value assignment which made the --user-domain option
ignored. Unit tests are updated to verify usage of domain options to
avoid further regressions.
Also drop the redundant look up of domain id to avoid unnecessary API
call.
Closes-Bug: #2085604
Change-Id: I5112b8e831fb26eb6544615277f0d3fe4f15dc5a
(cherry picked from commit 2e491191e5)
6c9d0a55f3