CBQE-0: MB-9707-add 30 seconds sleep after create bucket to get bucket
ready for replication

Change-Id: I2c6791a62616d4df0daf911e3bb02fd76f6edeb3
Reviewed-on: http://review.couchbase.org/31240
Reviewed-by: Sangharsh Agarwal <sangharsh.agarwal@globallogic.com>
Tested-by: Sangharsh Agarwal <sangharsh.agarwal@globallogic.com>