OAK-1395 Automatically cancel long running queries

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1567126 13f79535-47bb-0310-9956-ffa450edef68
OAK-919 : Proper handling of locks present on copied nodes
export lock package

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1567127 13f79535-47bb-0310-9956-ffa450edef68