ARGUS-17: implementation to update Argus policies for HBase GRANT/REVOKE
Merge branch 'master' of https://git-wip-us.apache.org/repos/asf/incubator-argus.git
ARGUS-17: added a flag to control whether HBase GRANT/REVOKE would
update policies in Argus.
ARGUS-17: added copyright text to new files; AccessControlLists.init()
is now called only when the flag to update Argus policies is enabled.