[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/4597408b847748ff9785bd28eee991... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/73170e35823a48e7bc1f8511aaa997ca : SUCCESS in 3m 51s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/af853d7d5ffa4f9f8e6567eea1fd6c06 : FAILURE in 3m 23s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/b8c6a4ba07e94be18a084c2e5d221d6f : FAILURE in 4m 16s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/d0198ca5d8314a05a8e096d972974854 : SUCCESS in 4m 36s