Build failed. https://zuul.opendev.org/t/openstack/buildset/6fbc197d0de44e97bb83347ffe08e72a - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/b8c86f4856764dc0ba5f2a216e608ff6 : SUCCESS in 4m 13s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/dd4f5b80a50245178105aeb13df691fa : FAILURE in 3m 05s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/a6103a6ab9bc4acda23c754557f10d68 : SUCCESS in 3m 14s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/5c945fe9d7dc4fefa390f8f81f86df13 : FAILURE in 3m 14s