Use released SLING API

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1621925 13f79535-47bb-0310-9956-ffa450edef68
Use released SLING API

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1621926 13f79535-47bb-0310-9956-ffa450edef68
Use released SLING API

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1621927 13f79535-47bb-0310-9956-ffa450edef68