Build failed. https://zuul.opendev.org/t/openstack/buildset/2ba0728f818c45cc9b3baf439409bb2f - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/6d72ef24baed4c73af8584671b5a1449 : SUCCESS in 4m 16s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/6a40f866cc764a238081133e47ce3888 : SUCCESS in 4m 14s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/36fe612c38804eaaa8c624068146d0a0 : FAILURE in 4m 10s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/540dc03b3782487fb876ad6954d34593 : FAILURE in 2m 40s