Merge remote-tracking branch 'upstream/security' into security
STORM-509. Make groups checking specific for SimpleACLAuthorizer.
STORM-509.  Make groups checking specific for SimpleACLAuthorizer.
Merge branch 'STORM-509' of https://github.com/harshach/incubator-storm into STORM-509

STORM-509. Make groups checking specific for SimpleACLAuthorizer.