vendor: Update Go grpc to 1.0.4.
vendor: Update Go grpc to 1.0.4.

Our Kubernetes instructions use "go get" to compile vtctlclient.

Since our generated gRPC services are no longer compatible with the latest gRPC version, we need to update it.

See: https://github.com/youtube/vitess/issues/1811#issuecomment-258740349

I ran the following command to update the dependency:

$ govendor fetch google.golang.org/grpc/...@=v1.0.4

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