[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/f363c9961a47446cbf4f5d9f74a0a9... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/d1c67363785f4792a0b2f59d2ef4641b : SUCCESS in 3m 17s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/2b89b46e98a944b08bad5ec952456685 : FAILURE in 3m 27s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/270f910f89fd48b1abda0ee7c85143b7 : SUCCESS in 3m 16s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/5b1eb398bd1b4ff89e75d427423c01d5 : FAILURE in 3m 42s