[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/e6a8b59d60f240c5bd2cfa4567c1a0... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/570721702894450e8c6f6252f791d149 : SUCCESS in 3m 38s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/d21e366e83e34b9594111a470e2950e3 : SUCCESS in 5m 06s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/91ab5747d2f04ee5970de280b8dc5be2 : SUCCESS in 4m 58s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/a7651abeea9043faa41980a8f2dc0138 : FAILURE in 3m 57s