Update ONOS version to 1.6.0-rc2

Change-Id: I5ed442fe65b7d48a8baa2daa3dc4d9410647c8c4
diff --git a/.gitreview b/.gitreview
new file mode 100644
index 0000000..77a1041
--- /dev/null
+++ b/.gitreview
@@ -0,0 +1,6 @@
+[gerrit]
+host=gerrit.onosproject.org
+port=29418
+project=aaa.git
+defaultremote=origin
+defaultbranch=master