[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/229d00af68294c1d8409a4cbf42fa5... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/a637c4e65ba04cf3ace8be618c6be4e5 : SUCCESS in 3m 52s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/d307a8c480c4431f95d3de359bcb54a7 : FAILURE in 2m 57s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/1659229367a1451fa301dc8ea42dcc84 : SUCCESS in 2m 51s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/b29963c4f8834bcda0c87c485741084b : FAILURE in 2m 56s