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.

before progressing to COMPLETED state and issue state change
notification to portal.

Also make state change report to be a single line for ease
of grep'ing log file.

in broadcast status message from CommEngine to portal.

rather than periodically on schedule.  This change has
no impact on user experience, and has improved logic,
and slight improvement in performance.

Also made all changes to the broadcasts structure under
synchronized control.