Don't glog top level command error message
Don't glog top level command error message

This is already printed to stderr through RootCmd.Execute().  We could
save to this the glog logs by supressing the RootCmd.Execute() error
output, but this displays a more user friendly error (i.e. no log
prepended info)

dlorenc/minikube,dlorenc/minikube,dlorenc/minikube,kubernetes/minikube,cu12/minikube,aaron-prindle/minikube,cu12/minikube,kubernetes/minikube,warmchang/minikube,dalehamel/minikube,dlorenc/minikube,abbytiz/minikube,kubernetes/minikube,dims/minikube,aaron-prindle/minikube,mikegrass/minikube,dims/minikube,kubernetes/minikube,dims/minikube,cu12/minikube,kubernetes/minikube,dlorenc/minikube,abbytiz/minikube,warmchang/minikube,dlorenc/minikube,mikegrass/minikube,abbytiz/minikube,dlorenc/minikube,kubernetes/minikube,aaron-prindle/minikube,mikegrass/minikube,r2d4/minikube,skipjaq/minikube,warmchang/minikube,dalehamel/minikube,warmchang/minikube,warmchang/minikube,dlorenc/minikube,r2d4/minikube,skipjaq/minikube,kubernetes/minikube,warmchang/minikube,skipjaq/minikube,r2d4/minikube,dalehamel/minikube,warmchang/minikube