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

Build failed. https://zuul.opendev.org/t/openstack/buildset/7f2d7bbcd3494edab062f5a9cb7a17... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/a192a594a165468a8deae83c52fddfff : SUCCESS in 6m 36s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/09fc7a18cd974e308da858e8e060aa6b : FAILURE in 6m 00s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/8e86090a1e9d4b18983a9febc77bca51 : SUCCESS in 4m 10s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/5c38975cf2bf4c07a66e27771ba617d6 : SUCCESS in 6m 27s