Using sadis:3.1.0 version

Change-Id: I6e87427a8014591477bc85d2ecbfb67da9a8ed4b
diff --git a/.gitreview b/.gitreview
index cdf73b5..f6d84d6 100644
--- a/.gitreview
+++ b/.gitreview
@@ -3,3 +3,4 @@
 port=29418
 project=aaa.git
 defaultremote=origin
+defaultbranch=voltha-1.7