Bug 23151: Tweak to use the new database structure

Bug 23151: Tweak to use the new database structure

This will use changed_fields to know whether a
borrower field is actually modified.

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
(cherry picked from commit 30fd4eb1a59fd480406261f30daa40692f16bc10)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>
(cherry picked from commit 9ca074496d30f4164679bba2c7458ccefe4fa254)

Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>