CBQE-0: do not run cbtransfer for windows since cbtransfer.exe does not work via remoute util

Change-Id: I51d96bbbdcb5523d993467d687e68fc68589bbec
Reviewed-on: http://review.couchbase.org/43752
Reviewed-by: Parag Agarwal <agarwal.parag@gmail.com>
Tested-by: Parag Agarwal <agarwal.parag@gmail.com>