Bug 23710: Use API to place holds for patrons

Bug 23710: Use API to place holds for patrons

This patch effectively uses API to place holds for patrons. It adds a listener on submit event of the form in javascript, where it calls holds API.

To test:

1. Place a hold on any biblio for a patron
SUCCESS => hold is placed or rejected, but no blank page with JSON error is shown.
2. Place a multi hold for any patron
SUCCESS => holds are placed or rejected, but no blank page with JSON error is shown.
3. Sign off

Signed-off-by: Lisette Scheer <lisetteslatah@gmail.com>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>