SOLR-5577: Likely ZooKeeper expiration should not slow down updates a given amount, but instead cut off updates after a given time. 

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1553912 13f79535-47bb-0310-9956-ffa450edef68
SOLR-5442: Move CHANGES entry to 4.6.1
SOLR-5445: Move CHANGES entry to 4.6.1

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1553942 13f79535-47bb-0310-9956-ffa450edef68
SOLR-5479: Move CHANGES entry to 4.6.1

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1553947 13f79535-47bb-0310-9956-ffa450edef68
SOLR-5532: Move CHANGES entry to 4.6.1

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1553950 13f79535-47bb-0310-9956-ffa450edef68