[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/68343932cfd84f32b69fdb319e9a06... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/67a1591c3446414fa8c3add03b28260c : SUCCESS in 6m 01s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/d8fdf2774e404d6da463c0d1dd845704 : SUCCESS in 4m 39s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/d5a4ac88d57847c49781b5382ab61491 : SUCCESS in 5m 08s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/fcb3db54033140bb966cce66329ceac6 : FAILURE in 4m 26s