[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/c55c872a0a1945e4919388a6e25a8b... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/becaeae978084ac19dd7afda613f1f5e : SUCCESS in 3m 43s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/3fa2c0a304634a70ac003a9666340abf : FAILURE in 3m 56s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/9406feba6ba54537a967abd423b20a15 : SUCCESS in 4m 59s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/93250a27d53444bcb4b70af1f331fbfe : FAILURE in 2m 34s