jupyterhub: Turn into a functional role !

jupyterhub/handlers/main.yml

+- name: restart jupyterhub
+  service: name=jupyterhub state=restarted
+
+- name: reload systemd
+  command: systemctl daemon-reload
\ No newline at end of file

jupyterhub/tasks/main.yml

@@ -47,13 +47,36 @@
     entry:</