I have finally uploaded qcow2 images for our test machines here:
This should save you from running PREPARE.
You can download them manually and unzip them into the right place, or
you can try out the wip/test-download-images branch. In that branch,
VERIFY will automatically download the images when necessary.
Now with shared 'golden' images, we have a chicken-and-egg problem when
a pull request requires changes to the images. But let's cross that
bridge when we get to it.