Bump travis download_mariadb script from 10.0.25 to 10.0.26
Bump travis download_mariadb script from 10.0.25 to 10.0.26

pivanof/vitess,dumbunny/vitess,mapbased/vitess,tirsen/vitess,dcadevil/vitess,mapbased/vitess,erzel/vitess,mattharden/vitess,alainjobart/vitess,HubSpot/vitess,vitessio/vitess,davygeek/vitess,alainjobart/vitess,sougou/vitess,erzel/vitess,mapbased/vitess,dumbunny/vitess,rnavarro/vitess,mahak/vitess,tinyspeck/vitess,enisoc/vitess,HubSpot/vitess,mattharden/vitess,sougou/vitess,erzel/vitess,tinyspeck/vitess,davygeek/vitess,mahak/vitess,erzel/vitess,rnavarro/vitess,vitessio/vitess,HubSpot/vitess,sougou/vitess,tinyspeck/vitess,enisoc/vitess,dcadevil/vitess,dumbunny/vitess,rnavarro/vitess,HubSpot/vitess,rnavarro/vitess,mapbased/vitess,rnavarro/vitess,vitessio/vitess,dumbunny/vitess,enisoc/vitess,sougou/vitess,dumbunny/vitess,mahak/vitess,applift/vitess,enisoc/vitess,tirsen/vitess,davygeek/vitess,erzel/vitess,mahak/vitess,tirsen/vitess,alainjobart/vitess,davygeek/vitess,tinyspeck/vitess,alainjobart/vitess,erzel/vitess,pivanof/vitess,applift/vitess,applift/vitess,dumbunny/vitess,tirsen/vitess,pivanof/vitess,pivanof/vitess,applift/vitess,rnavarro/vitess,davygeek/vitess,applift/vitess,vitessio/vitess,mahak/vitess,pivanof/vitess,mahak/vitess,dcadevil/vitess,dcadevil/vitess,mattharden/vitess,tinyspeck/vitess,tirsen/vitess,sougou/vitess,enisoc/vitess,HubSpot/vitess,rnavarro/vitess,dumbunny/vitess,HubSpot/vitess,mattharden/vitess,mapbased/vitess,mattharden/vitess,erzel/vitess,erzel/vitess,pivanof/vitess,davygeek/vitess,mahak/vitess,sougou/vitess,mattharden/vitess,vitessio/vitess,dumbunny/vitess,mapbased/vitess,pivanof/vitess,tinyspeck/vitess,alainjobart/vitess,mattharden/vitess,enisoc/vitess,dumbunny/vitess,erzel/vitess,mattharden/vitess,enisoc/vitess,vitessio/vitess,sougou/vitess,dcadevil/vitess,vitessio/vitess,dumbunny/vitess,vitessio/vitess,HubSpot/vitess,rnavarro/vitess,dcadevil/vitess,alainjobart/vitess,mattharden/vitess,mattharden/vitess,pivanof/vitess,tirsen/vitess,sougou/vitess,mahak/vitess,tirsen/vitess,applift/vitess,mapbased/vitess,applift/vitess,mapbased/vitess,applift/vitess,rnavarro/vitess,applift/vitess,mapbased/vitess,erzel/vitess,pivanof/vitess,applift/vitess,alainjobart/vitess,tinyspeck/vitess,alainjobart/vitess,dcadevil/vitess,davygeek/vitess,HubSpot/vitess,tirsen/vitess,tirsen/vitess,mapbased/vitess