Improve solr query efficiency by removing year facet stats from some search...
Improve solr query efficiency by removing year facet stats from some search builders. Advances DDK-237.
- blacklight_range_limit gem adds stats params to the default_processor_chain
- we only want that in normal search results pages with facets
- this especially removes it from our ItemSearchBuilder, which is used for queries generated for OAI-PMH