Build failed. https://zuul.opendev.org/t/openstack/buildset/777bbe06806a4f1a90656736545ab6a9 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/4469fe68996f4adaacf7d306fd8399fa : SUCCESS in 3m 42s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/e402a62d08274b7196c682e2840dcff2 : SUCCESS in 3m 29s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/9599b2ba30714643a8014045c95fb05c : SUCCESS in 2m 49s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/b840cdc5ffbf44cfbe33d7ebef7b6da9 : FAILURE in 2m 50s