@Override
  public NotificationEventResponse get_next_notification(NotificationEventRequest rqst)
      throws TException {
    authorizeProxyPrivilege();

    RawStore ms = getMS();
    return ms.getNextNotification(rqst);
  }
Check if newRole is in parent hierarchy of curRole
@param newRole
@param curRole
@return true if newRole is curRole or present in its hierarchy
@throws MetaException
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/HMSHandler.java