LUCENE-5801: add default indexFieldName to facetFields

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1612197 13f79535-47bb-0310-9956-ffa450edef68
SOLR-5968: BinaryResponseWriter fetches unnecessary stored fields when only pseudo-fields are requested

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1612200 13f79535-47bb-0310-9956-ffa450edef68