Build failed. https://zuul.opendev.org/t/openstack/buildset/f193e5eb6ca74fdf9017206d58361858 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/c1279f9be0104f4aaa9ba3dc96cbf53e : SUCCESS in 4m 14s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/719b860c95ac4ae1bc069233c6dff21e : SUCCESS in 4m 12s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/193d8cabfcd14e51802b023e0d67b52f : SUCCESS in 4m 23s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/68b9ca239fcb48aa9dbdc986aa276843 : FAILURE in 2m 45s