Bind uwsgi to 0.0.0.0 when listen_http is enabled.

A regression appeared in the uwsgi test when uwsgi set to listen to only
<%= node.ipaddress %> as it disabled listens on localhost.
Merge pull request #94 from gudmundur/uwsgi_bind_all

Bind uwsgi to 0.0.0.0 when listen_http is enabled.