Use release commons.json

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1621186 13f79535-47bb-0310-9956-ffa450edef68
Use release servlets.post

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1621187 13f79535-47bb-0310-9956-ffa450edef68