Add ipvs support for kubeadm 1.10 or later.

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

@@ -28,6 +28,12 @@ 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 }}]