Bug 9019: Return item fields in ILS-DI GetRecords

Bug 9019: Return item fields in ILS-DI GetRecords

Signed-off-by: Srikanth Dhondi <srikanth@catalyst.net.nz>
Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
1) Activate ILS-DI in system preferencs
2) Access http://.../cgi-bin/koha/ilsdi.pl to see documentation
3) Try http://.../cgi-bin/koha/ilsdi.pl?service=GetRecords&id=12+14
   with various valid biblionumbers for your system
4) Verify 952 is included in the <marcxml> and all other data displays
   correctly

All tests pass.

Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>