OAK-537 The Property2Index eagerly and unnecessarily fetches all data: remove unused code (the case where there is no index); make methods static when possible; use PathUtils instead of parsing the path itself

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1429882 13f79535-47bb-0310-9956-ffa450edef68