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

Build failed. https://zuul.opendev.org/t/openstack/buildset/45d1fe63bb244c119dc8c84a762f48... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/29b146a7c1dd42f29aaf07a14262599a : SUCCESS in 9m 02s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/268e8de171784248a1ef36f894575840 : TIMED_OUT in 40m 55s - openstack-tox-py38 https://zuul.opendev.org/t/openstack/build/b72c7c5a36fe4828ab47e4f5af733a1c : SUCCESS in 6m 13s