adding back upstart.yml

playbooks/roles/edxapp/tasks/upstart.yml

+# write the gunicorn upstart script for {{ service_variant }}
+- name: writing {{ basename }} upstart script to /etc/init
+  sudo: True
+  template: src={{ basename }}.conf.j2 dest=/etc/init/{{ basename }}.conf owner=root group=root
+  tags:
+  - upstart
+  - gunicorn
+  - update
+  - deploy