[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/fa7d1d8b6e744b22b0d95aa949beca... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/3dd8fee9128d423b96ce4e6973205a21 : SUCCESS in 3m 25s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/06d205a74d49469da4d8e051d2ffa7f3 : FAILURE in 2m 49s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/237efc0adcc943ffbb61c96530b6460b : SUCCESS in 4m 30s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/742a7dc9be8b4e8a950b9b1196a0d4a9 : FAILURE in 3m 09s