Bug 24458: Regression tests

Bug 24458: Regression tests

This patch introduces tests for searchResults. The idea is to set a
subfield as hidden in OPAC and another on the staff interface, and see
if searchResults honours this on the XSLTResultsRecord contents.

To test:
1. Apply this patch
2. Run:
   $ kshell
  k$ prove t/db_dependent/Search.t
=> FAIL: This is not really implemented

Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
Signed-off-by: Victor Grousset/tuxayo <victor@tuxayo.net>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>