Bug 25460: Update OAI sets when adding/editing/deleting item records

Bug 25460: Update OAI sets when adding/editing/deleting item records

Also adds syspref to optionally choose to embed item information in record when adding/editing bibliographic and item records.

Test plan:
1. Enable OAI-PMH and OAI-PMH:AutoUpdateSets sysprefs
2. Create a biblio record with 1 item with CCODE of NFIC
3. In Administration > OAI Sets configuration create a set and define
the mapping:
Field: 952, Subfield: 8, Operator: is equal to,  Value: FIC

4. Run the build_oai_sets.pl script:
 cd misc/migration_tools
 sudo koha-shell <instancename>
 ./build_oai_sets.pl -i

5. Check what items are in the OAI set:
sudo koha-mysql <instancename>
select * from oai_sets_biblios;

6. Observe your bib from step 2 is not in the set
7. [ITEM EDIT] Edit the item to have CCODE of FIC repeat step 5 and observe biblio is still not in OAI set
8. [ITEM ADD] Add a new item with CCODE of FIC and repeat step 5 and observe biblio
still not in OAI set
9. [ITEM DELETE] Delete one of your 2 items and repeat step 5 and observe biblio still
not in OAI set

10. Apply patch, update database and restart plack (instruction below on
the latter 2 actions):

cd installer/data/mysql
sudo koha-shell <instancename>
./updatedatabase.pl
sudo koha-plack --restart <instancename>

11. Enable new syspref OAI-PMH:AutoUpdateSetsEmbedItemData
12. [ITEM ADD] Repeat step 8 and observe biblio is now in the OAI set
13. [ITEM EDIT] Edit both items to have a CCODE of NFIC and repeat step 5 and
observe bib now not in set
14. [ITEM EDIT] Edit one of the items to have CCODE of FIC and repeat step 5
and observe bib now in set
15. [ITEM DELETE] Delete all items off bib and repeat step 5 and observe bib
no longer in set

Sponsored-By: Catalyst IT
Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>