[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/071f4f5d8267495499d72aaa715386... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/72da918374fc443e9043be1dd0f8bc90 : SUCCESS in 3m 42s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/97e9cb72aea9458d9c1515cc6f14600b : SUCCESS in 3m 38s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/b5c42ca47ecc4d208bdea3022cc497e6 : FAILURE in 3m 56s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/1d66ded883104adf97d01dc9da89ded7 : FAILURE in 3m 39s