Build failed. https://zuul.opendev.org/t/openstack/buildset/ecc6fcf342f64f638341545a40c71954 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/3c80d093247a4840914b2f37bced364f : FAILURE in 4m 16s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/f6a0dc3a60054345b981e697220bc9d8 : SUCCESS in 3m 14s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/046e4a958e5e43a782a80cf44e2f902d : SUCCESS in 2m 43s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/d96a15b9562e4129aa79be5d2b9d9234 : FAILURE in 3m 22s