CBQE-0 ::  Failover Tests - reduce sleep time and add it only for static data analysis

Change-Id: I80a524a410187a3f701a2e8f935e46da54649cc4
Reviewed-on: http://review.couchbase.org/41257
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Parag Agarwal <agarwal.parag@gmail.com>
Tested-by: Parag Agarwal <agarwal.parag@gmail.com>