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

Build failed. https://zuul.opendev.org/t/openstack/buildset/053f8b524e1f41b3b3006d4990740e... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/0af0ab6fa1fc456cb7f4cbafa618eac2 : FAILURE in 4m 46s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/9555dacca57f4a2f9e8f77565fd08120 : SUCCESS in 5m 07s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/9a272359958b4ae49dd205672598c82a : SUCCESS in 5m 16s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/a30e3039fedf4784bcdf89d22b4ae770 : SUCCESS in 5m 32s