The license of this project was set in the header of the python files as MIT, 
but there wasn't a file in the root directory specifying the general license
applied if no other is mentioned. This means the files without a header are
licensed as MIT as well as the ones currently with a header specifying it.

Signed-off-by: Sergi Blanch Torne <sergi.blanch.torne@collabora.com>
Part-of: <https://gitlab.freedesktop.org/gfx-ci/ci-collate/-/merge_requests/18>