[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/c1382228cc6f4dbdaa6097848fd681... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/b7953e709faf426a8f23910ed0a62d16 : SUCCESS in 2m 49s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/c0cb1594c96c42abbba9b46db05a74e9 : FAILURE in 2m 47s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/b1c80e16c5764e2692f143d1c816ad9e : SUCCESS in 3m 13s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/002bbee4b48f43f9be4a8ec509978397 : FAILURE in 2m 41s