SOLR-6146: Incorrect configuration such as wrong chroot in zk server address can cause CloudSolrServer to leak resources

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/branch_4x@1601622 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-5743: Add Lucene49NormsFormat

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/branch_4x@1601625 13f79535-47bb-0310-9956-ffa450edef68