fix 1.9 default branch

Change-Id: I8809b9509889bfca3dd07591c32d49e000522147
diff --git a/.gitreview b/.gitreview
index 328aec6..0086865 100644
--- a/.gitreview
+++ b/.gitreview
@@ -3,4 +3,4 @@
 port=29418
 project=onos.git
 defaultremote=origin
-defaultbranch=master
+defaultbranch=onos-1.9