Winstackers project has been retired
- https://review.opendev.org/c/openstack/governance/+/886880
this commit removes the content of oswin-tempest-plugin
deliverables of this project
Change-Id: I489d36a539cb943c1d7216390e469a471719a2cf
Most of the OpenStack projects have switched to stestr, mostly due
to the fact that testrepository seems to be unmaintained.
We'll do the same for oswin-tempest-plugin, especially since
testrepository no longer handles skip exceptions properly, treating
them as failures.
Change-Id: I27a20bad68fef9f19d46eea4aefcd7e4998fe838