OAK-2205 - Allow native query to be run against specifc property index

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1632270 13f79535-47bb-0310-9956-ffa450edef68
OAK-1941 - implement batched append update for update operations that do not require checking the current document state - improve _modified MAX handling

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1632274 13f79535-47bb-0310-9956-ffa450edef68