kvm-exporter supported only disk-type=virtio, as qemuqmpclient.driveBackup
source_drive defaults to virtio0.

For disk-type=ide the source_drive found to be ide0-hd0 by query-block during
runtime, and as it's used, now such disk type is supported.

Without a shebang, supervisord refuses to run the script with the
following error:

supervisor: couldn't exec /srv/slapgrid/slappart8/etc/prerm/slapos_wipe_device_disk: ENOEXEC
supervisor: child process was not spawned

This is a fixup of 0983f1ca

Caucase binaries are required for some testing scenarios.

cls.computer_partition_root_path is filled in by super.setUpClass.

Simplify the compilation to default cmmi

Removed already incorporated patch.

Keep old version and use it with software which needs it.

Patch has been adapted to the new version.

Relax Via string and define it once in caddy-frontend.