Bug 16866: Catch warning t/db_dependent/Languages.t

Bug 16866: Catch warning t/db_dependent/Languages.t

TEST PLAN
---------
1) prove t/db_dependent/Languages.t
   -- noisy output
2) apply patch
3) prove t/db_dependent/Languages.t
   -- no noise
4) run koha qa test tools.

Signed-off-by: Hector Castro <hector.hecaxmmx@gmail.com>
No noisy output

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
(cherry picked from commit 042e8cf24bf3de4192b4c7cf0ca4e5f1da6c3ce9)
Signed-off-by: Frédéric Demians <f.demians@tamil.fr>