Bug 22729: Adapt /patrons controller code to the change

Bug 22729: Adapt /patrons controller code to the change

This patch makes the controller code aware of the flgAnonymized =>
anonymized change.

To test:
- Run
  $ kshell
 k$ prove t/db_dependent/api/v1/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>