[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/dc16bd8915b74df2bf58a3e5dade8a... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/53ec0071d30c4743b96ed7bc986e9aa7 : SUCCESS in 5m 04s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/ed61d0f9b992478ca23b1372fff8b5c5 : SUCCESS in 8m 27s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/3ecb1eb7bf1c46068593e2c26309a1e6 : SUCCESS in 3m 55s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/5bf92b4cbd0d44f8be793e76f46843ce : FAILURE in 2m 49s