Update Rbs Elasticsearch module (facets is deprecated in elasticsearch server api).

Remove FacetGroup document.
Initialize facet tree.
Add 'originalTemplateName' twig template bloc attribute
Add facetFilters implementation
Add Model facet localization
Update facet value title and children facets
Add web action /Action/Rbs/Elasticsearch/StoreFacet
Merge pull request #996 from inthause/documents

Update Rbs_Elasticsearch module