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

Build failed. https://zuul.opendev.org/t/openstack/buildset/5086f45adaed44819ceb842b7f0bb8... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/3053d0fc2f09435b84ea2a0662b17eb3 : SUCCESS in 3m 48s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/d78533cd02fc494b9b3cf36a8ae0e5f7 : FAILURE in 3m 40s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/c5e81d78b5eb4c0f884a15b35525b13d : SUCCESS in 3m 25s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/89b7a179e0cd48e187c6874ea323e7cc : SUCCESS in 3m 32s