OAK-1953: Oak console on MongoMK fails with NPE

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1608463 13f79535-47bb-0310-9956-ffa450edef68
OAK-1953: Oak console on MongoMK fails with NPE

Change console default value for clusterId from 1 to 0 (automatic).

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1608464 13f79535-47bb-0310-9956-ffa450edef68
OAK-1947 Make backup and restore options generic
 - applied the fix from OAK-1953 to make the clusterId 0

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1608465 13f79535-47bb-0310-9956-ffa450edef68
OAK-1928: Cleanup test and execution fixtures
Update readme

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1608470 13f79535-47bb-0310-9956-ffa450edef68