OOZIE-1436 Revert SLA_XML and few other varchar columns back to clob (virag)

git-svn-id: https://svn.apache.org/repos/asf/oozie/trunk@1497947 13f79535-47bb-0310-9956-ffa450edef68
OOZIE-1433 ActionCheckX should override XCommand.getKey() to prevent duplicates (virag)

git-svn-id: https://svn.apache.org/repos/asf/oozie/trunk@1497949 13f79535-47bb-0310-9956-ffa450edef68
OOZIE-1435 StatusTransitService unnecessarily updates the lastModifiedTime of jobs which causes MaterializationService to bring same jobs in memory (virag)

git-svn-id: https://svn.apache.org/repos/asf/oozie/trunk@1497956 13f79535-47bb-0310-9956-ffa450edef68
OOZIE-1438 parentID is null in job event message of subworkflow action (ryota)

git-svn-id: https://svn.apache.org/repos/asf/oozie/trunk@1497959 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/trunk' into trunk
Merge remote branch 'origin/trunk' into trunk-gd