Bug 13476: Fix DataTables for the search items form

Bug 13476: Fix DataTables for the search items form

This items form is broken since the upgrade to DataTables 1.10.2 (commit
954c2874d0d9ebfa2e910dcd4445010115fac329).
The fnServerParams does not work anymore.

Test plan:
Go on catalogue/itemsearch.pl, launch a search and verify the data are
correctly displayed in the table.

Followed test plan. Works as expected.
Signed-off-by: Marc Véron <veron@veron.ch>
Signed-off-by: Mirko Tietgen <mirko@abunchofthings.net>
Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
The paging seems still a bit buggy, but this makes the
feature usable again!

Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>
(cherry picked from commit 6114c5fd6fe735f332e1615b33bf62de0f4d936e)
Signed-off-by: Chris Cormack <chris@bigballofwax.co.nz>