Add support for quiesce and shut down

The C++ service wrapper needs to be modified to handle quiesce and shutdown requests from the command line as well as from a Java controller.
A 'q' entered at the command line should cause the wrapper to wait for the processing instances to complete the current work before shutdown. A 's' entered at the command line should result in an immediate shut down. Ctrl C is to be handled as a quiesce and shutdown.