fix kubelet ip with quotes

roles/kubernetes/node/templates/kubelet.j2

@@ -11,7 +11,7 @@ KUBE_ALLOW_PRIV="--allow_privileged=true"
 KUBELET_API_SERVER="--api_servers={% for host in groups['kube-master'] %}https://{{ hostvars[host]['access_ip'] | default(hostvars[host]['ip'] | default(hostvars[host]['ansible_default_ipv4']['address'])) }}:{{ kube_apiserver_port }}{% if not loop.last %},{% endif %}{% endfor %}"
 {% endif %}
 # The address for the info server to serve on (set to 0.0.0.0 or "" for all interfaces)
-KUBELET_ADDRESS="--address={{ ip | default(0.0.0.0) }}"
+KUBELET_ADDRESS="--address={{ ip | default("0.0.0.0") }}"
 # The port for the info server to serve on
 # KUBELET_PORT="--port=10250"
 # You may leave this blank to use the actual hostname