Build failed. https://zuul.opendev.org/t/openstack/buildset/52c7749718aa4ffa8fcdfa7fd1249077 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/479988ea953d4153be34947828e96af7 : SUCCESS in 3m 46s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/657cb9a7c29b4968af0bb4a7c2039009 : SUCCESS in 2m 44s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/befe2152ca90439fa410b5534506d638 : SUCCESS in 4m 23s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/7aa9cadf4c11421a88594dd824febc15 : FAILURE in 3m 38s