
After we bumped tempest version used in refstack to the commit from Oct 2019 [1], we can remove concurrency workaround which was needed only until the tempest version used in refstack doesn't contain this commit [2] which is from Mar 2019. [1] https://review.opendev.org/c/osf/refstack-client/+/782592 [2] https://review.opendev.org/c/openstack/tempest/+/641349 Change-Id: I17d5df4635b0451e4442ef693f4293ee3851ff6d