[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/f3d6d26dcd9c4418b7c51c7b8bb766... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/b114bf4c4e974be4bd130cf05741ffd8 : SUCCESS in 3m 17s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/af26cc0b0fe44cffa227cbac39342b65 : FAILURE in 3m 15s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/48796d321b98455a846bedc559a68b97 : SUCCESS in 3m 12s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/42da804bd4914f4ca94bdef475c76140 : FAILURE in 3m 10s