@Override
    protected Procedure[] execute(MasterProcedureEnv env)
      throws ProcedureYieldException, InterruptedException {
      // Not letting the procedure to complete until timed out
      setState(ProcedureState.WAITING_TIMEOUT);
      return null;
    }
The systemUserConnection created here is tied to the system user. In case, you are planning to
create AccessTestAction, DON'T use this systemUserConnection as the 'doAs' user gets eclipsed
by the system user.
hbase-server/src/test/java/org/apache/hadoop/hbase/security/access/TestAccessController.java