Bug 36937: Remove warning from unit tests

Bug 36937: Remove warning from unit tests

This patch fixes a warning in the unit tests

Test plan:
1) prove t/db_dependent/api/v1/password_validation.t
2) There will be a warning in the output - 'Use of uninitialized value $status in numeric eq (==)'
3) Apply patch
4) Re-run the test
5) The warning will disappear

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: wainuiwitikapark <wainuiwitikapark@catalyst.net.nz>
(cherry picked from commit 0af87f009f5e66ee82ea33767489ef4158820377)
Signed-off-by: Frédéric Demians <f.demians@tamil.fr>