[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/d544b215616949db9b58b6b241122c... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/82e56f5954b34d009c3b0d9815945cb5 : SUCCESS in 3m 13s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/823e099008974c0e9eb4412931edbaff : FAILURE in 2m 35s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/942ecbe09fdf46d7b4eba5e65e65a714 : SUCCESS in 3m 32s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/070410c30f824547a6c39ee2c1e103d2 : FAILURE in 2m 27s