[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/cee65de537f343dfbc574bfd678b89... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/f151439895b944ccb941621320b07d54 : SUCCESS in 3m 16s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/b2992d25114e47eeb906cfb52982a3d4 : FAILURE in 2m 42s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/1bb16df2e86c40df8d1a9f63f0bc7746 : SUCCESS in 3m 11s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/7e31a31898d14820991c6d31fc85bf52 : FAILURE in 3m 02s