Update Travis to MariaDB 10.0.25.
Update Travis to MariaDB 10.0.25.

The mirror no longer holds the older version.

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