CHANGES entry for SOLR-3563: Unloading all cores in a SolrCloud collection will now cause the removal of that collection's meta data from ZooKeeper.
CHANGES entry for SOLR-3563: Unloading all cores in a SolrCloud collection will now cause the removal of that collection's meta data from ZooKeeper.

git-svn-id: 308d55f399f3bd9aa0560a10e81a003040006c48@1358220 13f79535-47bb-0310-9956-ffa450edef68

apache/solr,apache/solr,apache/solr,apache/solr,apache/solr