[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/d129785f2fed43d1895364e02f1d1f... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/7818d470dfa24307959289bdfd7670e6 : SUCCESS in 4m 16s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/f2bb246f557f4222947b20bbec9688dd : SUCCESS in 4m 15s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/f11306b20ed240dcabbf23818274ce27 : SUCCESS in 5m 05s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/dfd5a54385d5430d85e4fdfd01075ade : FAILURE in 3m 39s