[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/53b5e8dbb2d04de988729a3d48dede... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/e34531fece5e4de38bb2a35ad7c06e88 : SUCCESS in 3m 20s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/549bae628b564dacb7b981b3a380d6dc : FAILURE in 3m 00s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/32533d113e204f1eb14a92af6a2084f3 : SUCCESS in 3m 06s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/aa4c0ff3f1244b64b22033a753f7ac82 : FAILURE in 3m 36s