CBQE-0: remove duplicate scenario in py-newfailover.conf

Change-Id: I40b4b4480310ddbb77c23eed939420bacf7f6cbe
Reviewed-on: http://review.couchbase.org/40339
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Parag Agarwal <agarwal.parag@gmail.com>
Tested-by: Parag Agarwal <agarwal.parag@gmail.com>