Comment 9 for bug 1921679

We seem to install bunch of stuff from source including tripleo-ansible with tripleo-quickstart.

https://github.com/openstack/tripleo-quickstart/blob/master/quickstart-extras-requirements.txt#L15

I've tried to blacklist importlib-metadata with https://review.opendev.org/c/openstack/tripleo-ansible/+/783636 to see if it helps.