Comment 3 for bug 1893920

Reviewed: https://review.opendev.org/749548
Committed: https://git.openstack.org/cgit/openstack/kolla/commit/?id=aecf4c51e1d6a8795931191edb1f5aae29f93b4e
Submitter: Zuul
Branch: stable/ussuri

commit aecf4c51e1d6a8795931191edb1f5aae29f93b4e
Author: Michal Nasiadka <email address hidden>
Date: Wed Sep 2 18:13:17 2020 +0200

    Install newer virtualenv with relaxed importlib

    After setuptools 50.x release - virtualenv dictated by Ussuri constraints
    cause an error when using --system-site-packages, installing newer virtualenv
    solves the issue.
    Virtualenv 2.0.22 (and later) introduced a change to relax importlib.resources
    requirements which seems to solve the issue.

    Change-Id: I71ba982339d5dd4306b2166d346e3e6b1f3af60e
    Closes-Bug: #1893920