Build failed. https://zuul.opendev.org/t/openstack/buildset/29ed297bfd8a49088d70564983d3c6f2 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/53f9e709b4014c8fb03e935760f3b863 : SUCCESS in 4m 39s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/838708442c5b45228ef337d536799d2e : SUCCESS in 3m 39s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/9ba7d32487824cd29d941a5e71902729 : SUCCESS in 5m 57s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/c34a2b95b0f94c71ad3a608331630c69 : FAILURE in 3m 36s