Add support for atomic host

Updates based on feedback

Simplify checks for file exists

remove invalid char

Review feedback. Use regular systemd file.

Add template for docker systemd atomic

roles/kubernetes/node/templates/manifests/kube-proxy.manifest.j2

@@ -50,7 +50,11 @@ spec:
   volumes:
   - name: ssl-certs-host
     hostPath:
+{% if ansible_os_family == 'RedHat' %}
+      path: /etc/pki/tls
+{% else %}
       path: /usr/share/ca-certificates
+{% endif %}
   - name: "kubeconfig"
     hostPath:
       path: "{{kube_config_dir}}/node-kubeconfig.yaml"