[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/3f184421891847b387970f23cba06f... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/576375aa684542d9bef411d3b2d856c5 : SUCCESS in 3m 24s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/d5381a67f91048809ec9c3472fd64669 : FAILURE in 3m 38s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/c0198ff643274a73b0814eeca6a22816 : SUCCESS in 3m 34s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/401904f76e4745ad9c33cc718394c06f : FAILURE in 2m 35s