Bug 19532: Other objects used in recalls feature

Bug 19532: Other objects used in recalls feature

- biblio->recalls
- biblio->can_be_recalled
- item->recall
- item->can_be_recalled
- item->can_set_waiting_recall
- item->check_recalls
- patron->recalls
- Biblio.RecallsCount

and relevant tests
- t/db_dependent/Stats.t
- t/db_dependent/Koha/Item.t
- t/db_dependent/Koha/Biblio.t
- t/db_dependent/Koha/Patron.t
- t/db_dependent/XSLT.t
- t/db_dependent/Search.t
- t/db_dependent/Holds.t
- t/db_dependent/Circulation/transferbook.t
- t/db_dependent/Circulation.t

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>