Bug 25670: Add filter_by_active and filter_by_id_including_transfers

Bug 25670: Add filter_by_active and filter_by_id_including_transfers

This patch introduces a method to filter on the ordernumber, looking for
it on the aqorders_transfers table ('ordernumber_from' field).

It also adds a method for filtering on active orders.

To test:
1. Apply this patches
2. Run:
   $ kshell
  k$ prove t/db_dependent/Koha/Acquisition/Orders.t
=> SUCCESS: Tests pass!
3. Sign off :-D

lib

Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>