[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/e711c0a38ef54bc6b2a5305dbe961d... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/249fbf3422124647a90b4a1a0c7a13c4 : SUCCESS in 5m 31s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/fa54ba5ea8114363afb67e0eb43ba4ef : FAILURE in 3m 21s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/1f629dc4b3444b68b1a1456a52dcd898 : SUCCESS in 3m 48s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/26ff50228d924f029ef8885ff73d673b : FAILURE in 3m 22s