[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/d5031753a10646cea06ffea602dae5... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/8e620ecc54bf4149ac7d21ab79f4beaf : SUCCESS in 4m 39s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/c327cc5c400d47c3b31a896ba5b7ff96 : SUCCESS in 6m 05s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/9aa27475eb3848bcb78eed04efdeff8b : SUCCESS in 4m 48s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/88d2f5c999b04818a2983676c79a036c : FAILURE in 4m 18s