[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/ef359c6666e346c3ac9c33d1e90f2c... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/5f192670e4f84452b6741f80f0ff4225 : SUCCESS in 3m 06s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/7254922670d440e7a8894c194e5138f9 : FAILURE in 3m 02s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/11544b3e92784e519e7dceb0237e7741 : SUCCESS in 2m 59s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/2ac98c8de0d94dfcb310818c425937f2 : FAILURE in 2m 55s