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

Build failed. https://zuul.opendev.org/t/openstack/buildset/f8ebbdcdf62d49f7b5c24fb70f8108... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/3def1c14f3cb420c98e7f49f7c5eb9ca : SUCCESS in 6m 57s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/ea7feee193e7452b83d5ca79230e6d87 : FAILURE in 5m 41s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/2b2ff735686a46448a2ced439602a3ec : SUCCESS in 4m 40s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/9935dea769e34525a6e54f2c160b73ca : SUCCESS in 5m 55s