[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/f7092910277c4a07a0a16106afbb05... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/39c9cf1701a84b28b68f78e29f6a73c1 : SUCCESS in 2m 41s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/841ce040f5074743882bba81e3b419e0 : FAILURE in 3m 26s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/953ec75fd1824d3f881e65f7a3e4ff7b : SUCCESS in 3m 07s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/a666bd563de8488db2d82e1388259162 : FAILURE in 2m 44s