[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/0f488d6c436b421788503ff28c843e... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/b67957e7e848411ba82848084c5638b5 : SUCCESS in 3m 07s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/19d695c7dbcc4b6289e3d2484c5b3b82 : FAILURE in 2m 38s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/c4c90997d693465aa87eba8f20ea110c : SUCCESS in 4m 19s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/173cd06f81524b62809c774423a6cf9d : FAILURE in 3m 44s