LUCENE-5858: remove some test cruft

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/lucene5858@1621764 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-5858: fix javadocs

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/lucene5858@1621770 13f79535-47bb-0310-9956-ffa450edef68