This requires adding products, flavors and needles and test
cases, and tweaking some existing ones to handle the
slightly different behaviour of live images in shared tests.
To handle the different main hub screens in live and non-live,
a less stringent needle is added which is unregistered for
non-live tests, so they don't match on it before they've
finished updating repository metadata.
There are a few small bugfix tweaks in this too, like some
delays in user creation to try and avoid intermittent failures
there.
A new root_logged_in needle is also included, to handle a new
console font in Rawhide - that has nothing strictly to do with
live testing, it just happened to come up while working on
this.
