LUCENE-5449: patch up CHANGES.txt(s) to reflect backports.


git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1569975 13f79535-47bb-0310-9956-ffa450edef68
tests: remove this test

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1570001 13f79535-47bb-0310-9956-ffa450edef68