[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/af5c49d5a6e547cca0317509baedf5... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/fc10f724798c4745b8d9198e78950bbe : SUCCESS in 3m 53s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/a6d9ab9f05ff45068e231f142b298f98 : FAILURE in 4m 08s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/968d3cfe47674585a7b0785cbed68535 : SUCCESS in 3m 24s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/834f6d2283a64c1dafed1e75d205b87d : SUCCESS in 3m 46s