Converting mysql/query_benchmark to new vttest.
Converting mysql/query_benchmark to new vttest.

mattharden/vitess,tinyspeck/vitess,dcadevil/vitess,HubSpot/vitess,mahak/vitess,dcadevil/vitess,tirsen/vitess,mattharden/vitess,mahak/vitess,mattharden/vitess,enisoc/vitess,enisoc/vitess,mattharden/vitess,vitessio/vitess,alainjobart/vitess,enisoc/vitess,vitessio/vitess,tinyspeck/vitess,tinyspeck/vitess,enisoc/vitess,tirsen/vitess,alainjobart/vitess,tirsen/vitess,enisoc/vitess,sougou/vitess,enisoc/vitess,sougou/vitess,sougou/vitess,sougou/vitess,HubSpot/vitess,HubSpot/vitess,vitessio/vitess,mattharden/vitess,mattharden/vitess,sougou/vitess,dcadevil/vitess,vitessio/vitess,mattharden/vitess,davygeek/vitess,HubSpot/vitess,mahak/vitess,tirsen/vitess,davygeek/vitess,tirsen/vitess,dcadevil/vitess,alainjobart/vitess,dcadevil/vitess,tirsen/vitess,davygeek/vitess,tinyspeck/vitess,alainjobart/vitess,alainjobart/vitess,mattharden/vitess,tinyspeck/vitess,dcadevil/vitess,sougou/vitess,vitessio/vitess,sougou/vitess,vitessio/vitess,tirsen/vitess,sougou/vitess,enisoc/vitess,tinyspeck/vitess,mahak/vitess,mahak/vitess,vitessio/vitess,tinyspeck/vitess,davygeek/vitess,davygeek/vitess,mattharden/vitess,HubSpot/vitess,mattharden/vitess,HubSpot/vitess,vitessio/vitess,davygeek/vitess,mahak/vitess,alainjobart/vitess,dcadevil/vitess,alainjobart/vitess,mahak/vitess,alainjobart/vitess,davygeek/vitess,tirsen/vitess,tirsen/vitess,mahak/vitess,HubSpot/vitess,HubSpot/vitess