Build failed. https://zuul.opendev.org/t/openstack/buildset/8bf6d3bfbb174e8bb8141e3312e750f8 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/905ec9a16c6b4fa49d599e640a845d2a : SUCCESS in 4m 08s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/c8682e55ac2d499a8a31875e2f335c3d : FAILURE in 3m 06s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/ff6a3106fb87498387a7d51f71dac91a : SUCCESS in 3m 52s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/958b8b12010a4b12aefd8abf07f9028f : SUCCESS in 3m 51s