[Openstack-stable-maint] Stable check of openstack/oslo.middleware for ref refs/heads/stable/train failed

Build failed. https://zuul.opendev.org/t/openstack/buildset/bed8727c24544f3cb67c90f7b58f60... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/a9bfe88bcae442c9b2444408142a3b57 : SUCCESS in 5m 17s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/53fca94206014769b733a0470a1e5ee0 : FAILURE in 4m 20s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/b06c6e47a2ee487a898fa94829172d48 : SUCCESS in 2m 49s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/06cf7ef1208c4165bbcda8ca8cac9847 : FAILURE in 2m 44s