CBQE-0 :: change update:create:delete to update in failover, seeing a bug with testrunner as it hangs

Change-Id: I2eb9c5c5526774153b12362a16a8934ac7c9ee22
Reviewed-on: http://review.couchbase.org/40071
Reviewed-by: Thuan Nguyen <soccon@gmail.com>
Reviewed-by: Parag Agarwal <agarwal.parag@gmail.com>
Tested-by: Parag Agarwal <agarwal.parag@gmail.com>