Add listen addr, port and number of workers options
Add listen addr, port and number of workers options

Since ooi will be run as a new API endpoint, add the ooi_list,
ooi_listen_port and ooi_wokers so that we can configure where to listen
and how many processes to spawn.

Change-Id: If3a92c541f0d7eb95d37881bbe294a27d8cfa93f

stackforge/ooi,openstack/ooi