Creating 1.13 support branch

Change-Id: I2c63653f79a294100769c2991a46bd04032aec9d
diff --git a/.gitreview b/.gitreview
index 328aec6..c389ebf 100644
--- a/.gitreview
+++ b/.gitreview
@@ -3,4 +3,4 @@
 port=29418
 project=onos.git
 defaultremote=origin
-defaultbranch=master
+defaultbranch=onos-1.13