fix on v1alpha1

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

@@ -22,15 +22,15 @@ kubernetesVersion: {{ kube_version }}
 {% if cloud_provider is defined and cloud_provider != "gce" %}
 cloudProvider: {{ cloud_provider }}
 {% endif %}
-{% if kube_proxy_mode == 'ipvs' and kube_version | version_compare('v1.10', '<') %}
 kubeProxy:
   config:
+{% if kube_proxy_mode == 'ipvs' and kube_version | version_compare('v1.10', '<') %}
     featureGates: SupportIPVSProxyMode=true
     mode: ipvs
+{% endif %}
 {% if kube_proxy_nodeport_addresses %}
     nodePortAddresses: [{{ kube_proxy_nodeport_addresses_cidr }}]
 {% endif %}
-{% endif %}
 authorizationModes:
 {% for mode in authorization_modes %}
 - {{ mode }}