[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/966c44b1f7d5466daef869ef28cd63... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/50374e48c4c24b899074eec8f6fe67af : SUCCESS in 4m 23s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/b7a71da8066b4b61add5ebc4ea7b4cbe : FAILURE in 4m 53s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/464dff3606c04f6894ce904526de05da : SUCCESS in 5m 11s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/d4cc752b2853469aa75a63406b72a052 : SUCCESS in 5m 26s