Build failed. - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/1226504c220841b7893f549191fd477c : SUCCESS in 7m 17s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/e475472717c548c28a04007b882cc7fa : SUCCESS in 6m 11s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/271c148aefb54bc6b1e654d90090f050 : FAILURE in 4m 34s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/2d75448d02a84ab79f639784ce4c561f : FAILURE in 3m 51s