LUCENE-5904: fix false failures

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/lucene5904@1620576 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-5904: fix fails

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/lucene5904@1620580 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-5904: fix false fails

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/lucene5904@1620582 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-5904: fix false fail

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/lucene5904@1620584 13f79535-47bb-0310-9956-ffa450edef68