During master intialization we are setting ACLs for the znodes.
In ZKUtil.createACL(ZooKeeperWatcher zkw, String node, boolean isSecureZooKeeper),
Here we are directly setting "hbase.superuser" value to Znode which will cause an issue when multiple values are configured. In "hbase.superuser" multiple superusers and supergroups can be configured separated by comma. We need to iterate them and set ACL.