Build failed. https://zuul.opendev.org/t/openstack/buildset/619727842f1e4e4f8b50ba561c71d8a1 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/86a40e627aba4e24951d621c1713321e : SUCCESS in 3m 55s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/f1416e8f323a44748951d546e381b9c8 : FAILURE in 2m 47s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/096cd11ff39246698de26f23eb631dbf : SUCCESS in 4m 28s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/1229f5021699447a85acfdc46ff23f1b : SUCCESS in 7m 17s