SOLR-4657, core left open during stress tests

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1463068 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-4861: make BreakIterator per-field in PostingsHighlighter

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1463083 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-4893: facet counts were multiplied as many times as FacetsCollector.getFacetResults was called

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1463085 13f79535-47bb-0310-9956-ffa450edef68
Merge remote-tracking branch 'upstream/trunk' into trunk