[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/859ce71acd2b4405bbe9f293ad73fe... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/a9a2aa4d6387416c8645ece1d702ca43 : SUCCESS in 3m 21s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/69624fade6c141ab91072770ea5f2c12 : FAILURE in 2m 46s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/72efbdb7a7f84614a1be3aa7762e6c78 : SUCCESS in 2m 30s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/177a1a6453784236b9ffed633aadb47d : FAILURE in 3m 12s