[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/45ace44695b74310a615527635656d... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/3a301ed26d384bce831bed602e5f1444 : SUCCESS in 6m 32s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/9c8c3ccaa4914f1c976b6539e58e170c : SUCCESS in 5m 14s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/90cedba918614295954833d0e4c35a43 : SUCCESS in 3m 43s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/2e22a9d72ffc467ca37a88b150947494 : FAILURE in 3m 41s