[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/ba0b9843607b49598a844492671341... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/44ea6fb3fc0941a284ee6e3b7c3c999f : SUCCESS in 2m 52s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/a71ebb9fd93a4b828ba6a163c997dc09 : POST_FAILURE in 3m 32s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/4b03f3f1ce8348cdba2c5f07fcd5bb03 : SUCCESS in 2m 56s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/94e44cc2fabf4f27b3884643c8606ce5 : FAILURE in 3m 30s