[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/757712f9a0e243f3a16c5b0a4fbcf3... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/8bd1b118faf54b8c9b4201b853203100 : SUCCESS in 3m 53s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/9942878042354e75a66988ac22f22e1f : SUCCESS in 4m 58s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/98de0eebfb574ee6ab45618e9fcc0201 : SUCCESS in 5m 00s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/12613fd977524d92af540d2749a88e49 : FAILURE in 3m 59s