Fix set coreos hostname failed (#3599)
Fix set coreos hostname failed (#3599)

need set hostname by kubeadm
insequent/kargo,kubernetes-sigs/kubespray,kubernetes-incubator/kubespray,kubespray/kargo,Atoms/kubespray,kubernetes-sigs/kubespray,Atoms/kubespray,kubernetes-incubator/kargo,Atoms/kubespray,kubernetes-sigs/kubespray,kubernetes-incubator/kubespray,kubespray/kargo,insequent/kargo,Atoms/kubespray,kubernetes-sigs/kubespray,kubernetes-incubator/kargo