VOL-2775 Multicast flows can not be installed due to the following error.

"NNIPortNumber is not in valid range"

This patch delivers a fix for the situation.

Change-Id: I3953835bb07fbd41079094cf36a375ff0331910b
diff --git a/VERSION b/VERSION
index 5f0cf38..19013e6 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.3.20-dev
+2.3.21-dev