Code review comment for lp:~rconradharris/nova/lp794672

I'm not quite so sure this belongs in Nova. This is adding a very simple load-balancing implementation that, to be useful, needs to be very well thought out. For example, what happens when one of your glance servers is down? What if the glance servers are running different versions of the registry api? I think this is a good idea that should be left up to a deployer.

As a side note, I couldn't get the flag set up correctly. What should that look like?