* tests/testarchive.py: Organize debs in pool/ structure, for better reusability. * tests/ubuntu_drivers.py: Drop expected failures, they've succeeded for a long time. This needs to be fixed properly if there's a bug. * sl-modem plugin: Keep environment for aplay, just ensure it's using the C locale. (LP: #1296425) * Disable linux-firmware-nonfree autopkgtest for now. bcma does not declare any firmware dependencies and linux-firmware-nonfree does not declare modaliases, so it either just works now, or the driver needs fixing first.