Build failed. https://zuul.opendev.org/t/openstack/buildset/4f20a5845434470a92c7e58f3971c1af - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/84d524b4de1f47f197b1cdaf0aef7872 : FAILURE in 3m 58s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/60675d0991914244b6cc44ee7fce7451 : FAILURE in 4m 35s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/ae7fd9951e6045cba11c8a81b202ec85 : FAILURE in 4m 07s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/b145e7b02244483aa326172fb4b51406 : FAILURE in 4m 04s