Build failed. https://zuul.opendev.org/t/openstack/buildset/b0ed21b21bf0456b8b9dc0548a96b521 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/50b01456d83442caa22a9a202b8afe9b : SUCCESS in 3m 53s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/9c2bf1e3a0054cfd82f7775f7108e230 : FAILURE in 3m 46s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/59fd908f9f8b4e2887f705e482d507c0 : SUCCESS in 5m 01s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/2a2776bf79884c4abaa19a053eae8d65 : SUCCESS in 5m 29s