Bug 22729: Adapt Koha::Patron(s) and tests

Bug 22729: Adapt Koha::Patron(s) and tests

This patch adapts the Koha::Patron(s) code to the column change.
To test:
- Apply this patches
- Run:
  $ kshell
 k$ prove t/db_dependent/Koha/Patrons.t
=> SUCCESS: Tests pass!
- Sign off :-D

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>