CBQE-699 Flush tests with moxi and ascii client

Change-Id: Ifd3e02bcedbe327401a28c12b0984211b8ea02c9
Reviewed-on: http://review.couchbase.org/23976
Reviewed-by: Deepkaran Salooja <deepkaran.salooja@globallogic.com>
Tested-by: Deepkaran Salooja <deepkaran.salooja@globallogic.com>