[Openstack-stable-maint] Stable check of openstack/nova for ref refs/heads/stable/ussuri failed

Build failed. https://zuul.opendev.org/t/openstack/buildset/08364839500146ef9f13cae4a84c20... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/5b3fdc45ec354230a8aede1cd9aa6f27 : SUCCESS in 9m 06s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/902eca63d1504341b6096c5e258f583c : POST_FAILURE in 13m 23s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/b777efb622c24583a1c373d685627538 : SUCCESS in 10m 19s