[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/51253c2b49fb4604939d03de9c2579... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/d470f12ddd1d4676b6e6b056283d3809 : SUCCESS in 3m 42s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/73dfa523526e4f9b96ca52c9883018be : FAILURE in 4m 35s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/f363954034a346cca03e8f7b1a44a9b3 : SUCCESS in 3m 27s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/40308eaf7158495c8173cbf30c8f346e : SUCCESS in 3m 37s