[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/748cf31a7632463ab79fa02fd0f963... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/568c8710a74c4468ae917987117504ab : SUCCESS in 4m 26s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/a0fa2edea00e4fbe9314e9874210b613 : SUCCESS in 4m 15s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/17d3f98f200347809bcd30ebc5eeaa73 : SUCCESS in 5m 16s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/dbb060c8ed174d259ded82029d964e23 : FAILURE in 4m 08s