Bug 24612: Use the reserve_id to identify a reserve when building a notice

Bug 24612: Use the reserve_id to identify a reserve when building a notice

Now that we have the reserve_id PK on the reserves table we should use
it (instead of the couple borrowernumber, biblionumber)

Signed-off-by: Victor Grousset/tuxayo <victor@tuxayo.net>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
(cherry picked from commit aa1f0fd73fa2a8dadd86ef5defc390e164845429)
Signed-off-by: Aleisha Amohia <aleishaamohia@hotmail.com>