OAK-741: Better toString() methods
better match json representation

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1469261 13f79535-47bb-0310-9956-ffa450edef68
javadoc

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1469262 13f79535-47bb-0310-9956-ffa450edef68