#521 Support for graceful termination of OpenSAF services/components

[Mathi Naickan]

#7 exposed the bug in componentterminate callback of node directors as explained in #501

This ticket is a place holder for OpenSAF Node Directors and Director components to implement mechanism for gracefully shuttingdown themselves from within the saAmfCompTerminateCallback().

This mechanism could be like cleaning up the system resources these components are using, synchronized cancel of their threads and child processes, etc.