OAK-2253 - Index node only if configured property changed

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1636799 13f79535-47bb-0310-9956-ffa450edef68
OAK-1993 - Add command to dump Lucene index in Oak Console

Fix the constructor to use the NodeBuilder

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1636801 13f79535-47bb-0310-9956-ffa450edef68