[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/702be23eabae4405a14459b1efb71f... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/44d9659ae6244e6a980f905b68de36b3 : SUCCESS in 3m 08s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/cb9a133720ae4f3eaa377d2b465edbe7 : FAILURE in 2m 56s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/5456f91a1db845eda71a932cefd0f433 : SUCCESS in 2m 48s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/c3acb934821841199cffb4b0be37157f : FAILURE in 3m 31s