fix docker opts incompatible running on aarch64 Redhat/Centos

On Aarch64, the default cgroup driver for docker is systemd
instead of cgroupfs. Should conform kubelet to use systemd
as cgroup driver as well to keep it consistent with docker.

Without this change, below exception will be raised.
/usr/bin/docker-current: Error response from daemon: shim
error: docker-runc not installed on system.

Change-Id: Id496ec9eaac6580e4da2f3ef1a386c9abc2a5129

roles/kubernetes/node/templates/kubelet.standard.env.j2

@@ -40,6 +40,9 @@ KUBELET_HOSTNAME="--hostname-override={{ kube_override_hostname }}"
 {% if kubelet_authorization_mode_webhook %}
 --authorization-mode=Webhook \
 {% endif %}
+{% if ansible_architecture == "aarch64" and ansible_os_family == "RedHat" %}
+--cgroup-driver=systemd \
+{% endif %}
 --enforce-node-allocatable={{ kubelet_enforce_node_allocatable }} {% endif %}{% endset %}
 
 {# DNS settings for kubelet #}