Bug 34489: Fix timezone problem in Patrons.t

Bug 34489: Fix timezone problem in Patrons.t

See also bug 34930. Using same approach.

Test plan:
export TZ='Europe/Amsterdam'
prove t/db_dependent/Koha/Patrons.t

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
(cherry picked from commit 6109a41ca607f826bb7bce5083009c74139d898a)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>
(cherry picked from commit f2228f40ab201ed6762c900b157235e221c534ed)
Signed-off-by: Jacob O'Mara <jacob.omara@ptfs-europe.com>