SOLR-6363: fix test bug - shut down Derby properly

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1617314 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-5875: reduce page size of backing packed array used by NodeHash when building an FST from 1B to 128M values

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1617315 13f79535-47bb-0310-9956-ffa450edef68
SOLR-6363: no CHANGES.txt for trunk-only fix

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1617317 13f79535-47bb-0310-9956-ffa450edef68