SOLR-4729: Move CHANGES.txt entry to 4.3.0
SOLR-4729: Move CHANGES.txt entry to 4.3.0

git-svn-id: 308d55f399f3bd9aa0560a10e81a003040006c48@1476491 13f79535-47bb-0310-9956-ffa450edef68

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