Bug 32775: (follow-up) Unit tests

Bug 32775: (follow-up) Unit tests

Test plan:
1. Apply this patch and restart services
2. Run t/db_dependent/Languages.t
3. Notice tests 16 and 17 sometimes fail
4. Apply all the other patches and restart services
5. Run t/db_dependent/Languages.t
6. Notice all tests consistently pass

Sponsored-by: Kinder library, New Zealand
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
(cherry picked from commit 283cb0fd13a2a63470e5575d8bf62a089f79f289)
Signed-off-by: Pedro Amorim <pedro.amorim@ptfs-europe.com>