Build failed. https://zuul.opendev.org/t/openstack/buildset/b72fb05570bf4b09848ece012ac7a1f2 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/d365d3f70c9c44d2b880d13557b59cf1 : SUCCESS in 12m 20s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/07b6cb4d582a40c6a963dd758078029d : SUCCESS in 10m 56s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/6bb6d05c698d466b975832f8142fe287 : SUCCESS in 9m 51s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/51498acfd9db45f090005273cc9520c2 : FAILURE in 8m 54s