Bug 13853: Show waiting hold expiration date for waiting holds in holds ajax datatable

Bug 13853: Show waiting hold expiration date for waiting holds in holds ajax datatable

We should show the expiration date for waiting holds in the holds
datatable that appears in circulation.pl and moremember.pl

Test Plan:
1) Ensure ReservesMaxPickUpDelay is set
2) Place a hold on a record
3) Place a second hold and set it to waiting by checking it in
4) Place a third hold with an expiration date
5) View the holds tab on circulation.pl and moremember.pl
6) Note the first hold has no expiration date
7) Note the second hold has an expiration date of today + ReservesMaxPickUpDelay days
8) Note the thrid hold has an expiration date of whatever you set it to

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Cathi Wiggins <CWIGGINS@ci.arcadia.ca.us>
Signed-off-by: Megan Wianecki <mwianecki@mplmain.mtpl.org>
Signed-off-by: Jonathan Druart <jonathan.druart@koha-community.org>
Signed-off-by: Tomas Cohen Arazi <tomascohen@unc.edu.ar>