[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/a74bb07afa074380b42435c05ada3d... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/25def75a25f4460a85500283b624ed14 : SUCCESS in 4m 25s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/ddc672c9ddee4034be29bb897ce0b2a7 : SUCCESS in 4m 27s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/ccfbd91f8bfa4c41a9444ee8d9ef3a02 : SUCCESS in 6m 43s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/6db069838a904473824b7f01eda3534e : FAILURE in 4m 02s