Fix kubeadm v1alpha1 configure

roles/kubernetes/master/templates/kubeadm-config.v1alpha1.yaml.j2

-apiVersion: kubeadm.k8s.io/v1alpha2
+apiVersion: kubeadm.k8s.io/v1alpha1
 kind: MasterConfiguration
 api:
 {% if groups['kube-master'] | length > 1 and kubeadm_config_api_fqdn is defined %}
@@ -8,14 +8,13 @@ api:
  bindPort: {{ kube_apiserver_port }}
 {% endif %}
 etcd:
-  external:
-      endpoints:
+  endpoints:
 {% for endpoint in etcd_access_addresses.split(',') %}
-      - {{ endpoint }}
+  - {{ endpoint }}
 {% endfor %}
-      caFile: {{ kube_config_dir }}/ssl/etcd/ca.pem
-      certFile: {{ kube_config_dir }}/ssl/etcd/node-{{ inventory_hostname }}.pem
-      keyFile: {{ kube_config_dir }}/ssl/etcd/node-{{ inventory_hostname }}-key.pem
+  caFile: {{ kube_config_dir }}/ssl/etcd/ca.pem
+  certFile: {{ kube_config_dir }}/ssl/etcd/node-{{ inventory_hostname }}.pem
+  keyFile: {{ kube_config_dir }}/ssl/etcd/node-{{ inventory_hostname }}-key.pem
 networking:
   dnsDomain: {{ dns_domain }}
   serviceSubnet: {{ kube_service_addresses }}
@@ -29,12 +28,6 @@ kubeProxy:
 {% if kube_proxy_mode == 'ipvs' and kube_version | version_compare('v1.10', '<') %}
     featureGates: SupportIPVSProxyMode=true
     mode: ipvs
-{% elif kube_proxy_mode == 'ipvs' %}
-kubeProxy:
-  config:
-    featureGates:
-      SupportIPVSProxyMode: true
-    mode: ipvs
 {% endif %}
 {% if kube_proxy_nodeport_addresses %}
     nodePortAddresses: [{{ kube_proxy_nodeport_addresses_cidr }}]