Release openolt chart with 2.4 bugfix

Change-Id: I1e02c2e5fdd48ed266f4637dd645a5d46156d2fc
diff --git a/.gitreview b/.gitreview
index 2b11b97..e914234 100644
--- a/.gitreview
+++ b/.gitreview
@@ -3,3 +3,4 @@
 port=29418
 project=voltha-helm-charts.git
 defaultremote=origin
+defaultbranch=voltha-2.4