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

Build failed. https://zuul.opendev.org/t/openstack/buildset/aa95801e37144e59b77b64595c8129... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/6b9cfc2de96e48fc8813bfa46f283171 : SUCCESS in 6m 14s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/54d70becf1f941c286030585f8548dc6 : TIMED_OUT in 41m 23s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/0f6f61f91369471293228b57ec7b40b7 : SUCCESS in 6m 43s