Bug 17441 - t/db_dependent/Letters.t fails on Jenkins

Bug 17441 - t/db_dependent/Letters.t fails on Jenkins

Run prove t/db_dependent/Letters.t

Signed-off-by: Claire Gravely <claire_gravely@hotmail.com>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
To improve consistency, adding a follow-up.

Signed-off-by: Brendan Gallagher <brendan@bywatersolutions.com>
(cherry picked from commit ff495c5fa8c58a7762b3494e97d90618d649f7a8)
(cherry picked from commit 4ee9399028fda3f5b8cfbfd9c43eb50349569e91)
Signed-off-by: Julian Maurice <julian.maurice@biblibre.com>