[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/ecd878e3eb724a889ae4e170895169... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/7aa5c21d06b343d0bac08eeac1f789f5 : SUCCESS in 3m 41s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/f59d0916121545beb3d279bd1907f6ae : FAILURE in 3m 06s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/b6e36104a514436bbb3b6f2b542830ce : SUCCESS in 2m 58s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/f610cc2bf08045a192efe559c9c03250 : FAILURE in 2m 47s