Trafodion node needs to be gracefully shutdown when the node is brought down

When a node in a Trafodion cluster is brought down using linux commands like shutdown, init 6 and reboot, the trafodion processes need to be stopped before the underlying the stack is stopped. Otherwise, some of the processes can dump core which are being restarted as part of the persistence concept of Trafodion. RMS processes, TM are examples of such persistence processes.