Bug 26567: Allow to limit subscription search to subscriptions with routing lists

Bug 26567: Allow to limit subscription search to subscriptions with routing lists

Adds a search option to the advanced search in the
serials module that allows to limit search on subscriptions
with routing lists.

Test plan:
1. Apply this patch
2. Create two subscriptions, one with a routing list and one without
3. Navigate to Serials home and tick the checkbox labeled "Search routing lists only:"
4. Confirm that the only search result to appear is the subscription you added the routing list to
5. Run unit tests: prove t/db_dependent/Serials.t

Sponsored by: Bibliotheksservice-Zentrum Baden-Wuerttemberg

Signed-off-by: Christian Stelzenmüller <christian.stelzenmueller@bsz-bw.de>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>
Perltidied changes to make QA test tools pass.

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>