LUCENE-5399: add fangs, but no new bugs found...

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/lucene539399@1558565 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-5399, SOLR-5354: fix distributed grouping to marshal/unmarshal sort values properly

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/lucene539399@1558618 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-5399: remove nocommit

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/lucene539399@1558621 13f79535-47bb-0310-9956-ffa450edef68