[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/541eb4a00b82474c96669d14bdf832... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/caf96329ace845ce8b3496edf27e674d : SUCCESS in 3m 39s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/17d722532e814b6ead47c75a59aff89e : FAILURE in 2m 29s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/823beff73d0344b6b3d8ee4a827ed8c1 : SUCCESS in 3m 40s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/2dbadf4f3dfa4d998175eebd23f06c3d : FAILURE in 2m 47s