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

Build failed. https://zuul.opendev.org/t/openstack/buildset/4db2056bf77c44bcbc5c44bbafe7bc... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/666ccbcc515344e3af35502296fa5436 : SUCCESS in 5m 03s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/58ec3806d48a46c0826dbdef8153a8a1 : SUCCESS in 4m 37s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/dd7218e146ba4ea38b2c13527f358158 : SUCCESS in 5m 07s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/3e2e2bd21e4547559aa79f5d3a00177c : FAILURE in 4m 47s