Bug 31013: Quote branchcodes in Elasticsearch limits

Bug 31013: Quote branchcodes in Elasticsearch limits

This patch adds quoting when handling branchcodes in searching in order
to prevent errors when branchcodes are reserved words in ES

To test:
0 - Be using Elasticsearch with Koha
1 - Add a new branch code:OR name:Orly
2 - Add an item to this branch
3 - Use advanced search to limit search to only Orly
4 - Oh really bad, the search fails!
5 - Apply patch
6 - Repeat search
7 - Oh really good, the search succeeds
8 - prove t/db_dependent/Koha/SearchEngine/Elasticsearch/QueryBuilder.t

Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>