The module backports features to Python 2.6 and 2.7. If it is available,
the tests will use it. If it is not available, it will fall back to
regular unittest. On Python 2.7, the tests pass anyway. On Python 2.6,
there are failures with Python 2.6.
Signed-off-by: Lubomír Sedlář <lsedlar@redhat.com>
The performed checks:
* If format is ISO, the file must have correct magic string
* If it's bootable, there must be MBR or GPT
When a check fails on any failable deliverable, it will be logged and
the file removed from metadata (it will still remain on the disk). This
required a change to write the images.json file later (after test
phase).
Signed-off-by: Lubomír Sedlář <lsedlar@redhat.com>