* Add changelog and warning about unstable API in testutil
* Add primer tests, (running pylint on external libs during tests)
In order to anticipate crash/fatal messages, false positives are harder
to anticipate. Follow-up will be #5359 and later on #5364
Add '__tracebackhide__ = True' so the traceback is manageable
Co-authored-by: Daniël van Noord <13665637+DanielNoord@users.noreply.github.com>
