[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/09a8a3efaf9d4198ba2b7dde25dc7a... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/a1a9e7cd50414128a4ddb78eecdbb748 : SUCCESS in 2m 52s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/f78e76050dbe4abbbe91845066df89f1 : FAILURE in 3m 11s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/3202d73aed4c49058b3af6d2e30d011d : SUCCESS in 2m 34s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/5845a66cb14248d6ab42a0830482f515 : FAILURE in 3m 12s