Tests resulting in "CANCEL" in Avocado are usually canceled on
purpose, and are almost identical to "SKIP".  The logs for canceled
tests are adding a lot of noise to the logs being shown on GitLab CI,
and causing distraction from real failures.

As a side note, this "after script" is scheduled for removal once the
feature is implemented within Avocado itself.

Reference: https://github.com/avocado-framework/avocado/issues/4266


Signed-off-by: Cleber Rosa <crosa@redhat.com>
Message-Id: <20201009205513.751968-3-crosa@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>