Fix bug of sometimes not terminating broadcast when paused with large number of service threads.

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

src/main/java/altk/comm/engine/Broadcast.java

@@ -220,6 +220,7 @@ public abstract class Broadcast
         toStates.put(BroadcastState.CANCELING, Arrays.asList(
                 BroadcastState.ABORTING,
                 BroadcastState.ABORTED, 
+                BroadcastState.COMPLETED,
                 BroadcastState.CANCELED, // User action
                 BroadcastState.PURGED     // User action
             ));
@@ -233,6 +234,7 @@ public abstract class Broadcast
         // Transitions from PAUSING
         toStates.put(BroadcastState.PAUSING, Arrays.asList(
                 BroadcastState.RUNNING,    // User action
+                BroadcastState.COMPLETED,
                 BroadcastState.ABORTING,
                 BroadcastState.CANCELED, // User action
                 BroadcastState.PAUSED,
@@ -1182,7 +1184,10 @@ public abstract class Broadcast
 	    	serviceActivityCount += increment;
 	    	if (increment < 0 && serviceActivityCount <= 0)
 	    	{
-	    		if (state == BroadcastState.RUNNING) 
+	    		if (state == BroadcastState.RUNNING
+	    		   || state == BroadcastState.PAUSING
+	    		   || state == BroadcastState.CANCELING
+	    		   ) 
     			{
 	    			// TODO: investigate possibility that 0 remainingJobCount may
 	    			// not be final.  It may still change because a finishing job