[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/f17f19da2a374c3aaf1f2d94e07ed9... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/a9c7500164b9485e9ecbcd7b9cdd5b41 : SUCCESS in 3m 24s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/0e61b0b2cfe44c55b08dd6ca5cf1ed0a : FAILURE in 2m 57s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/3ea0341f077c4b52becb57b54a117d3c : SUCCESS in 2m 52s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/7fd027677d254c418e3bd3356b3eaea8 : FAILURE in 3m 13s