Code review comment for lp:~nuclearbob/utah/config-changes

I pushed a new branch that should address those, and also change the default install type to mini to save download time and disk space for people who don't care what type of install they're using.

As far as vm_release_list is concerned, I'd like to deprecate the vmtools integration soon. I'm testing the automatic iso downloading stuff now, and I'll propose a merge once it all looks good, probably later today.