[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/5c6316c6b2d844418901835d753797... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/e5b6467ba13a48fd8e12c68df0b30479 : SUCCESS in 3m 29s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/5b89f03d40e944e99017eade9d2991b5 : SUCCESS in 5m 01s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/00e8e7828d50438caca403cf7061fc70 : SUCCESS in 5m 11s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/9e979af56f71491e92e5f4ad5964346b : FAILURE in 4m 26s