Bug 24823: Drop Catmandu dependency

Bug 24823: Drop Catmandu dependency

Replace remaining Catmandu dependant code with the Search::Elasticsearch
equivalent.

To test:
1) Apply patch
2) Run tests in t/Koha/SearchEngine/Elasticsearch.t, t/Koha/SearchEngine/ElasticSearch/*
and t/db_dependent/Koha/SearchEngine/*
3) All tests should pass

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>