Build failed. https://zuul.opendev.org/t/openstack/buildset/6cb4cbcb51b447838767b988bcfeebc0 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/a2c5edd9529b4156b69e69ea1f5f411c : SUCCESS in 4m 00s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/80a1cee0bc734e6da518e4709b3e46e8 : SUCCESS in 5m 18s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/57df45b9ae2847e582d85faba5eb9696 : SUCCESS in 4m 39s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/87240b3db6b64302b6d2761dad251931 : FAILURE in 4m 44s