VOL-2686 Configure multicast MEs when flows are pushed and tp is configured

Change-Id: I67c22f526a315d21b2395b5bdced77ebf12a5d4d
diff --git a/VERSION b/VERSION
index 6d6ae0c..3b31fa0 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.3.20
+2.3.21