OAK-1906 - Adding information to a Standard MBean interface using annotations

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1605036 13f79535-47bb-0310-9956-ffa450edef68
OAK-1893 - MBean to dump Lucene Index content and related stats

Use the new annotations from oak-commons for description

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1605038 13f79535-47bb-0310-9956-ffa450edef68