fix vtexplain to use new .Execute API
fix vtexplain to use new .Execute API

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