[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/b8166428cd884120b3c7de3bfa142a... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/ef24bad426b0465ab047c510c0742b54 : SUCCESS in 3m 19s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/c4e8156fa7604fceb17a6d46ba2aad19 : FAILURE in 3m 40s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/f44341912a194dffabdde9a26e18b918 : SUCCESS in 3m 28s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/d981a0c2e2bb4217978e70ed0c2a687b : FAILURE in 3m 43s