Achieved by adding the isBroadcastFatal method to Job class.

Thie allows for removal of entries from the original enum JobStatus that more
appropriately belong to derivation of CommEngine.  Such data complicates
the management of the original JobStateus when adding new CommEngines.
These entries can be declared in a new enums implementing
the JobStatus interface, for each derived CommEngine.

Use reason field in Broadcast to record reason for pause, cancel etc.

Improved reponse text to pause and resume commands.

The service threads do not terminate immediately, but, instead
each service thread picks up one more job before terminating,
causing servicing more jobs which are not reported back to portal.

This happens when all remaining jobs are being serviced by
service threads when PAUSE is initiated.  Similarly fixed
for CANCEL.