OAK-2218 Allow SegmentNodeBuilder to provide child builders of the same type
 - clarified contract of #updated method for child builders

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1633768 13f79535-47bb-0310-9956-ffa450edef68
OAK-2203 Full reindexing is triggered when the IndexEditor is missing



git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1633783 13f79535-47bb-0310-9956-ffa450edef68