Fix kube_hostname_override inconsistencies (#4185)

inventory/sample/group_vars/k8s-cluster/k8s-cluster.yml

roles/kubernetes/kubeadm/defaults/main.yml

...ernetes/kubeadm/templates/kubeadm-client.conf.v1alpha2.j2

...ernetes/kubeadm/templates/kubeadm-client.conf.v1alpha3.j2

...bernetes/kubeadm/templates/kubeadm-client.conf.v1beta1.j2

...bernetes/master/templates/kubeadm-config.v1alpha3.yaml.j2

...ubernetes/master/templates/kubeadm-config.v1beta1.yaml.j2

roles/kubespray-defaults/defaults/main.yaml

..._nodes/kubernetes_patch/files/hostnameOverride-patch.json

roles/win_nodes/kubernetes_patch/tasks/main.yml