Build failed. https://zuul.opendev.org/t/openstack/buildset/c255b2169ad544eea3a49e92b6de1137 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/a2920eb0746740e68e42b944debf279d : SUCCESS in 3m 39s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/281f861bd6e64e1c82f6d6a1419e381a : SUCCESS in 4m 26s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/56cf8a6d3f3f4cdfa90f3b8c143ca3f5 : SUCCESS in 2m 58s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/7f031ca3324f4f349768ba6de2b0c6f7 : FAILURE in 2m 54s