Fix messages dropping twice in partition

Author: Antoni Nowakowski

simulator/src/main/java/byzzbench/simulator/faults/behaviors/ByzzFuzzDropMessageBehavior.java

@@ -100,8 +100,9 @@ public void accept(FaultContext context) {
         if (router.haveConnectivity(sender, recipient)) {
             return;
         }
-
-        // otherwise, drop the message: the sender and recipient are in different partitions
-        context.getScenario().getTransport().dropEvent(e.getEventId());
+        if(e.getStatus() == Event.Status.QUEUED) {
+            // otherwise, drop the message: the sender and recipient are in different partitions
+            context.getScenario().getTransport().dropEvent(e.getEventId());
+        }
     }
 }