[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/9d6f626d15594ed19a000ef9c8f54b... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/54d58cefcc6849d78cfa8dc6b08f1faf : SUCCESS in 4m 02s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/de08b422d69c452aa27c15ac7ac2fc6f : SUCCESS in 3m 39s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/b2efed3d4ea74fe4b7a31abbbfe03033 : SUCCESS in 4m 24s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/5e369580a83c4eeb83db776003bd6225 : FAILURE in 4m 12s