Fix gitreview on master branch

Change-Id: Ie14db6b7582dfc928ece009c503f386b7b093933
diff --git a/.gitreview b/.gitreview
index 0086865..328aec6 100644
--- a/.gitreview
+++ b/.gitreview
@@ -3,4 +3,4 @@
 port=29418
 project=onos.git
 defaultremote=origin
-defaultbranch=onos-1.9
+defaultbranch=master