Bug 16489: ES code incorrectly refers to Moose

Bug 16489: ES code incorrectly refers to Moose

Probably a leftover from the original SolR code, there are unused references to Moose in the new Elasticsearch code.

To test:
- Run:
  $ git grep Moose
=> FAIL: There are unneeded references to Moose:
Koha/SearchEngine/Zebra/QueryBuilder.pm:use Moose::Role;
Koha/SearchEngine/Zebra/Search.pm:#use Moose::Role;
- Apply the patch
- Run:
  $ git grep Moose
=> SUCCESS: No references to Moose
- Run:
  $ prove t/Search* t/db_dependent/Search*
=> SUCCESS: Tests pass
- Sign off

Signed-off-by: Jacek Ablewicz <abl@biblos.pk.edu.pl>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Jesse Weaver <jweaver@bywatersolutions.com>