[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/b715de0eed1247dc92d91f27da6a73... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/c29de54eeb454816a015b2ca57cd6849 : SUCCESS in 4m 42s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/54ce316dc20840929f9b32c931a2b0b4 : SUCCESS in 2m 45s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/2be6440664f24203b370a0dfff3b8eb4 : SUCCESS in 4m 39s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/0381db3446504f96bf2b27d14b2b4c01 : FAILURE in 4m 03s