Add the xqueue_consumer upstart template.

playbooks/roles/xqueue/templates/xqueue_consumer.conf.j2

+# gunicorn
+
+description "xqueue server"
+author "devops <devops@edx.org>"
+
+start on runlevel [2345]
+stop on runlevel [!2345]
+
+respawn
+respawn limit 3 30
+
+env LANG=en_US.UTF-8
+
+chdir /opt/wwc/xqueue
+setuid www-data
+
+exec /opt/edx/bin/django-admin.py run_consumer --pythonpath=/opt/wwc/xqueue --settings=xqueue.aws_settings 12