Implementation of new Flow Subsystem:

The subsystem no longer returns futures for tracking completion of work.
Notifications are explicitely returned via a call back mechanism. Also, the
subsystem is now asynchronous.

Change-Id: I1a4cef931c24820f9ae9ed9a5398f163f05dfbc9

more flowservice improvements

Change-Id: I5c9c1b6be4b2ebfa523b64f6f52e7634b7d3e05f

more flowservice impl

Change-Id: I05f6774460effb53ced8c36844bcda2f8f6c096f

Manager to store functional (at least i believe it)

Change-Id: I09b04989bd1004c98fe0bafed4c76714b9155d53

flow subsystem functional: need to fix unit tests

Change-Id: I1667f25b91320f625a03e5e1d5e92823184d9de0

flow subsystem functional

Change-Id: I429b3335c16d4fc16f5d55f233dd37c4d1d6111d

finished refactor of flow subsystem

Change-Id: I1899abc6ff6a974a2018d936cc555049c70a6804

fix for null flow provider to use new api

Change-Id: If2fd9bd5baf74d9c61c5c8085cef8bc2d204cbdc
diff --git a/core/net/src/test/java/org/onosproject/event/impl/TestEventDispatcher.java b/core/net/src/test/java/org/onosproject/event/impl/TestEventDispatcher.java
index c3f9ba0..87fc585 100644
--- a/core/net/src/test/java/org/onosproject/event/impl/TestEventDispatcher.java
+++ b/core/net/src/test/java/org/onosproject/event/impl/TestEventDispatcher.java
@@ -31,7 +31,7 @@
 
     @Override
     @SuppressWarnings("unchecked")
-    public void post(Event event) {
+    public synchronized void post(Event event) {
         EventSink sink = getSink(event.getClass());
         checkState(sink != null, "No sink for event %s", event);
         sink.process(event);