OOZIE-1507 Command queue filling up with duplicate commands from RecoveryService (rohini)

git-svn-id: https://svn.apache.org/repos/asf/oozie/branches/branch-4.0@1516893 13f79535-47bb-0310-9956-ffa450edef68
Excluding WorkflowGenerator module from 4.0 Release package

git-svn-id: https://svn.apache.org/repos/asf/oozie/branches/branch-4.0@1516932 13f79535-47bb-0310-9956-ffa450edef68
OOZIE-1510 Fix branch-4.0 compilation (mona)

git-svn-id: https://svn.apache.org/repos/asf/oozie/branches/branch-4.0@1516939 13f79535-47bb-0310-9956-ffa450edef68