Releasing new olt and igmpproxy fixes

Change-Id: Id81ec879d77178f295ba8c65f31f95dccf4dfd67
diff --git a/.gitreview b/.gitreview
index 473a40c..1af485e 100644
--- a/.gitreview
+++ b/.gitreview
@@ -3,4 +3,4 @@
 port=29418
 project=voltha-onos.git
 defaultremote=origin
-defaultbranch=master
+defaultbranch=voltha-2.4