Build failed. https://zuul.opendev.org/t/openstack/buildset/3585640ff8ae43feb3e3e1c661a66c40 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/5b01d6d05ce644f1bcd97a032b875264 : SUCCESS in 6m 14s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/1cc9bc75905e4f2d98a6a373c5c8100b : SUCCESS in 7m 27s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/d1af45176bd44d3cbe21d525a688229b : SUCCESS in 7m 16s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/b926ef79850d401cbced33be133adcfc : FAILURE in 4m 59s