c391343fcd
In 0945178b3c6fd9e33002dd6e3c6f77dfca49565a we decided that Perl-based VM tests should be deprecated and will be removed between 20.03 and 20.09. So let's switch `nixos-build-vms(8)` to python as well (which is entirely interactive, so other scripts won't break). In my experience, the test-driver isn't used most of the time, so this patch is mainly supposed to get rid of the (probably misleading) deprecation warning when running `nixos-build-vms`. Apart from that, the interface for python's test-driver is way nicer.
*** NixOS *** NixOS is a Linux distribution based on the purely functional package management system Nix. More information can be found at http://nixos.org/nixos and in the manual in doc/manual.