OAK-2134 Lucene: not using the path restriction can speed up queries

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1627538 13f79535-47bb-0310-9956-ffa450edef68
OAK-2133 Lucene: improved batching and logging

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1627542 13f79535-47bb-0310-9956-ffa450edef68