Build failed. - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/621b1fb319474d7e8b6646fc9f73ef3b : SUCCESS in 5m 27s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/1e05ed8115f443aaa42e7aa1533076bc : SUCCESS in 7m 38s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/8695d4e80bac43b8a77daece8189a537 : SUCCESS in 8m 29s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/f6a9a9af1116408783ad4779d4a27e85 : FAILURE in 5m 22s