Add a simple tool `osbuild-composer-image-definitions` which dumps the
matrix of all distributions, architectures and image types names
supported by composer as a JSON to the stdout.
Default to fetching the image test case generation matrix directly from
composer. This eliminates the need to update a JSON source file with
this information every time a new distro or image type are added to
composer.
Delete the previously used JSON source file with the image test case
generation matrix.
Signed-off-by: Tomas Hozza <thozza@redhat.com>
40c095a850