CBQE-0 Use non firewall test for failover in sanity tests

Change-Id: Ic613390fa77d8f264c992e5604a615a9abeb5c92
Reviewed-on: http://review.couchbase.org/25777
Reviewed-by: Deepkaran Salooja <deepkaran.salooja@globallogic.com>
Tested-by: Deepkaran Salooja <deepkaran.salooja@globallogic.com>