SLING-3994 - simplified replication components' dependency management, minor javadoc adjustments

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1629162 13f79535-47bb-0310-9956-ffa450edef68
SLING-3994 - adjusted imports and javadocs

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1629167 13f79535-47bb-0310-9956-ffa450edef68