Bug 20866: (QA follow-up) Use build_object and remove two tests

Bug 20866: (QA follow-up) Use build_object and remove two tests

The unique constraint on userid is handled in TestBuilder. So let's use it.
The two tests if count==$count do not make much sense anymore when we
call ->count a few lines before. The check with search_limited is enough.

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>