Update git review for ramcloud branch

Change-Id: I8b22a14f4619c8f45c5c7d8214b146c2ee08c417
diff --git a/.gitreview b/.gitreview
index 6cd044e..d404b06 100644
--- a/.gitreview
+++ b/.gitreview
@@ -2,4 +2,4 @@
 host=gerrit.onos.onlab.us
 port=29418
 project=ONOS.git
-defaultbranch=master
+defaultbranch=dev/ramcloud