Bug 36315: ILSDI GetRecords use AuthorisedValues cache for items.location

Bug 36315: ILSDI GetRecords use AuthorisedValues cache for items.location

Speedup GetRecords by using Koha cache for items.location authorised value.

Test plan
1) Enable ILS-DI http://localhost:8081/cgi-bin/koha/admin/preferences.pl?op=search&searchfield=ILS-DI
2) Download a record   http://localhost:8080/cgi-bin/koha/ilsdi.pl?service=GetRecords&id=1
3) Note location_description
4) Apply patch
5) Re download the same record
6) Verify location_description are the same

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>