Build failed. https://zuul.opendev.org/t/openstack/buildset/ca3c58b1f8094faa9d46d9cfa4b3df28 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/a81ba7e0742a403d8e0eb5f8a2bd1ee9 : SUCCESS in 3m 28s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/93098328847743afadfe2a73f18e95b1 : SUCCESS in 3m 23s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/08e9b754a87a4a698ce4b646e02bd8df : FAILURE in 3m 16s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/38b2d4a78c3049dfb7f6676c85ba6034 : FAILURE in 5m 28s