Build failed. https://zuul.opendev.org/t/openstack/buildset/96306f1bef1649a5a31e2592d2a4bd4b - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/fe059ae6af424a6a8ce69d4ff869f7b9 : SUCCESS in 3m 10s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/d3b91f6a6d194199a90ef2db612dd78c : SUCCESS in 3m 43s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/4b792261b40e479b88642eb14ed5632f : SUCCESS in 3m 26s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/d66343a5a9894b55b96a9913f00e2361 : FAILURE in 3m 47s