support/testing: add gitlab download helper testing
Like for the github helper, add some tests to test the download of
Gitlab's generated tarball.
[1] f83826c90daf9cdb5a6196d2d2830eea8c2f0e09
Signed-off-by: Romain Naour <romain.naour@gmail.com>
Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Cc: Yann E. MORIN <yann.morin.1998@free.fr>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>