Add new scenarios for upgradeXDCR

Change-Id: I24a7934e9951486a244b5f46682b69e249ef6802
Reviewed-on: http://review.couchbase.org/28825
Reviewed-by: abhinav dangeti <abhinav.dangeti@gmail.com>
Tested-by: Ketaki Gangal <ketakigangal@gmail.com>