Fix kubeadm v1beta1 configuration taint (#3928)

* Use master node taint same as kubeadm configuration v1alpha3 or before.

roles/kubernetes/master/templates/kubeadm-config.v1beta1.yaml.j2

@@ -9,9 +9,8 @@ nodeRegistration:
 {% endif %}
 {% if inventory_hostname in groups['kube-master'] and inventory_hostname not in groups['kube-node'] %}
   taints:
-  - key: "kubeadmNode"
-    value: "master"
-    effect: "NoSchedule"
+  - effect: NoSchedule
+    key: node-role.kubernetes.io/master
 {% endif %}
 {% if container_manager == 'crio' %}
   criSocket: /var/run/crio/crio.sock