[Openstack-stable-maint] Stable check of openstack/oslo.concurrency for ref refs/heads/stable/train failed

Build failed. https://zuul.opendev.org/t/openstack/buildset/f47a17c38b4748578e20a724458ada... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/c25e1cf145524e5d981916b8c3c80f7f : SUCCESS in 5m 50s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/d4b96543a07b4e3499137fd40076b917 : POST_FAILURE in 4m 30s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/7df6304cbd4d4418921b456cd9d1568f : SUCCESS in 3m 33s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/8a3bb0354c044ce1929e877841d2beee : SUCCESS in 4m 01s