set default branch to 1.11

Change-Id: Ia638dcf7b54cc0ecec261cfdf2e527af9e05bf86
diff --git a/.gitreview b/.gitreview
index 328aec6..f38f033 100644
--- a/.gitreview
+++ b/.gitreview
@@ -3,4 +3,4 @@
 port=29418
 project=onos.git
 defaultremote=origin
-defaultbranch=master
+defaultbranch=onos-1.11