updated to use handlers

roles/docker/tasks/systemd-proxies.yml

@@ -6,12 +6,4 @@
   template:
     src: http-proxy.conf.j2
     dest: /etc/systemd/system/docker.service.d/http-proxy.conf
-  register: systemddockerproxy
-
-- name: reload systemctl daemons
-  shell: systemctl daemon-reload
-  when: systemddockerproxy.changed
-
-- name: restart docker so configs are applies
-  service: name=docker state=restarted
-  when: systemddockerproxy.changed
+  notify: restart docker