Build failed. https://zuul.opendev.org/t/openstack/buildset/0ebb0d212837456d9843cfd25c9f601c - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/90703ce330ce465bbd7cc6ea8a6d0504 : SUCCESS in 5m 38s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/4cb4b271a3f143b5ba8a16a417df930c : SUCCESS in 3m 16s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/9215909e8f7a4d8bab47722545d738e1 : FAILURE in 4m 51s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/727cc4d1261843f6a4b7a5f311c7f116 : FAILURE in 2m 50s