[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/c6b9e1c6f5984d0c9c15a0d4a7aa43... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/1efd9f0f63d74f3f9f2520de9997a998 : SUCCESS in 3m 00s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/4bb2b3ea536446f1a012d1a50025d47f : FAILURE in 3m 44s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/7cd4a8d6261140f4b73e9b582846e3c7 : SUCCESS in 3m 05s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/425cb246d2b74f5cbd7ee70716d049bb : FAILURE in 3m 15s