[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/f9baacf1a66e4a7bbd960ab77cce44... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/62106118453845ecb16a39d749c3ce68 : SUCCESS in 2m 52s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/a0523658029e4d71920aac6367b1e9dc : FAILURE in 3m 33s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/825d2f64c07544a4ba0eeb31f0d36d9b : SUCCESS in 2m 48s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/a984652f18ad4dd985560b68e91e58bd : FAILURE in 3m 38s