[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/c259a6ec28764026a7d6e93c8f0561... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/ddddcd36836a4d75a74dd5b8289bd595 : SUCCESS in 3m 36s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/4fdf1196307b4b278b3c60b29ec1679e : SUCCESS in 6m 04s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/222bd68e36ea4ff3b7ebfcd75f326794 : SUCCESS in 4m 18s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/5538979033c1473693ae9c716997e455 : FAILURE in 5m 24s