[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/50b9cb9786a34f6391a72a5e0b54a0... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/f66445064f7a42b08f180a54b1038065 : SUCCESS in 3m 46s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/d50b1b4a400a448ead54a84b638cb0c5 : FAILURE in 5m 58s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/c8ac6b4c7a6e49eca7adcf1328277fb5 : SUCCESS in 4m 56s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/e49a8839615847be8f343b9bf09ab18d : FAILURE in 4m 13s