[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/61077d76ec864659b087ba0ca57b45... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/ff5aced328b54abaafe8a7ae56eadf11 : SUCCESS in 3m 09s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/39aa31e6329b4a79b9c0c849b0555828 : FAILURE in 3m 17s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/ab0ad9ad01cc4dcbbf429e6be110748f : SUCCESS in 3m 33s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/c40683b714574c16bd680a38eccc349e : FAILURE in 2m 50s