Build failed. https://zuul.opendev.org/t/openstack/buildset/43d3bac4bc2f47c58f7c71ebc78bf789 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/52193ca636ba47a6884bc1dc8e97a6bf : SUCCESS in 3m 20s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/49ee8953c2e9480382366d9f9c58ea48 : SUCCESS in 4m 34s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/39bb0a4b5301469ea0fb5006abec7136 : SUCCESS in 5m 47s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/50fce2b5f4954138861319a5ace4515b : FAILURE in 4m 19s