bumping to version 2.2

Change-Id: Ifcc19606ceb5fe28f6830e55efd70cf9766e59ce
diff --git a/.gitreview b/.gitreview
index 328aec6..43b5c0f 100644
--- a/.gitreview
+++ b/.gitreview
@@ -3,4 +3,4 @@
 port=29418
 project=onos.git
 defaultremote=origin
-defaultbranch=master
+defaultbranch=onos-2.2