Bug 24062: Make sure TestBuilder will stop generate X or other invalid category's...

Bug 24062: Make sure TestBuilder will stop generate X or other invalid category's types

To make sure this kind of random failures will not appear in a future we
are going to fix it at TestBuilder level.

Test plan:
  prove t/db_dependent/TestBuilder.t
and confirm it returns green

You could also only apply the tests against master, run them several
times and confirm that they fail most of the time.

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