CBQE-0: py-failover.conf with GROUP=GRACEFUL

add these tests in http://qa.sc.couchbase.com/view/3.0.0/

Change-Id: I2986fa71e131c6d703612d348d98fe1064a9c2bb
Reviewed-on: http://review.couchbase.org/34945
Reviewed-by: Andrei Baranouski <andrei.baranouski@gmail.com>
Tested-by: Andrei Baranouski <andrei.baranouski@gmail.com>