SLING-4140 - renamed and moved Sling Replication to Sling Content Distribution

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1637333 13f79535-47bb-0310-9956-ffa450edef68
SLING-4140 - renamed and moved Sling Replication to Sling Content Distribution

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1637335 13f79535-47bb-0310-9956-ffa450edef68