Code review comment for lp://staging/~vila/ubuntu-ci-services-itself/secgroups

Does firewall-mode: global not work as recommended [1] and by ev:

2014-02-14 11:46:49 ev cjohnston: I think we're safe to enable `firewall-mode: global` here for now
2014-02-14 11:47:03 ev it's okay if these things are all listening on 8080

This would remove the need for the script and for a 5 line description of what leon means.

[1] https://bugs.launchpad.net/juju/+bug/1027641/comments/7