[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/dad4090436bd4b1e86e826dd6865fd... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/6942d9d09ec1468ab50c923a744d52d7 : SUCCESS in 3m 59s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/c3b9a24abe674b4a8fcd9025143c0633 : SUCCESS in 4m 32s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/14971c5e66a14d658a6c304013d7629c : SUCCESS in 5m 23s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/912efc42a3d34f20b9d1fb257e8ac320 : FAILURE in 4m 15s