[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/c1861b04e54f4f95a5714db53993be... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/740bda531d7b4586b1c25d3b847d8e25 : SUCCESS in 4m 26s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/5657301789c04f74ab3fbb487e0d24e6 : RETRY_LIMIT in 3m 03s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/5ad8d406639a4b079000649be94389fb : RETRY_LIMIT in 11m 13s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/2d2ae92284c44c8896661b398e5b8734 : RETRY_LIMIT in 8m 14s