[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/2b8b3c8974584a37afa64e217323d9... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/ebc8cda06ccd4a68a0f83169b38d33ab : SUCCESS in 4m 06s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/5544971dbf6440608ba9af41365c0ee7 : FAILURE in 3m 42s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/f3ec891f4d3f4e979c68f9f635173324 : SUCCESS in 3m 33s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/ee7b5628f202403f93592725f2384716 : FAILURE in 3m 30s