[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/a44d7f2e0ffc4df7a364492a4bf815... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/0ccdb69f2e7d4f6caf1c0f2f5c00409c : SUCCESS in 5m 00s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/8cc36011356346b3a1f8767a13235f9c : FAILURE in 5m 41s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/b7f7f04bc75d4983acded78a41e3e58f : SUCCESS in 4m 15s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/cd2a18b5251e4643be19e93e3b2afc22 : FAILURE in 5m 47s