LP#1306753: Only look at holds that expire before 'today'

We should not count today when generating the hold expiration list.
So, we'll look for holds that expire before 'today' instead of those
that expire before 'now'.

Signed-off-by: Mike Rylander <mrylander@gmail.com>
Signed-off-by: Kathy Lussier <klussier@masslnc.org>
Signed-off-by: Ben Shum <bshum@biblio.org>
Release notes entry for holds shelf expire change

Signed-off-by: Kathy Lussier <klussier@masslnc.org>
Signed-off-by: Ben Shum <bshum@biblio.org>