Code review comment for lp:~javier.collado/utah/bug1024364

This looks good. Do we need to check for other emulators when we're running qemu, or just kvm? If we don't need that check for qemu, we can move it down to after we check the emulator, and only check if it's kvm. Either way, I'll go ahead and do the merge, it's definitely an improvement on what we have now.