Adding 'make test' target to validate chart versions

Change-Id: I5cb8a3914e7643c9b478efea4455cacdd93f9831
diff --git a/.gitreview b/.gitreview
index 2b11b97..b6f18ed 100644
--- a/.gitreview
+++ b/.gitreview
@@ -3,3 +3,4 @@
 port=29418
 project=voltha-helm-charts.git
 defaultremote=origin
+defaultbranch=master