Comment 2 for bug 1294959

i was reading:

 http://blog.utlemming.org/2013/04/official-ubuntu-mirrors-in-hp-cloud.html

looks like "nova.clouds.archive.ubuntu.com" works for both hpcloud and canonistack. However, I think we can code up a solution where we update sources.list using a configuration parameter. I'll give it a shot today.