Bug 19532: Recalls objects and tests

Bug 19532: Recalls objects and tests

Koha/Recall.pm
- biblio
- item
- patron
- library
- checkout
- requested
- waiting
- overdue
- in_transit
- expired
- cancelled
- finished
- calc_expirationdate
- start_transfer
- revert_transfer
- set_waiting
- revert_waiting
- set_overdue
- set_expired
- set_cancelled
- set_finished
- should_be_overdue

Koha/Recalls.pm
- add_recall
- move_recall

and relevant tests

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>