updating git review with correctv branch

Change-Id: I5072899f076473a7f11f73aa6dfb29e12dc1c34b
diff --git a/.gitreview b/.gitreview
index f459132..2d5436f 100644
--- a/.gitreview
+++ b/.gitreview
@@ -3,3 +3,4 @@
 port=29418
 project=voltha.git
 defaultremote=origin
+defaultbranch=voltha-1.7