Build failed. https://zuul.opendev.org/t/openstack/buildset/e5e62d8a7c25445aa13fe5dc723f525b - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/9fb5f47351fa44da930c03b7b5df5361 : SUCCESS in 4m 05s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/0f67b92252954d85a3900c4de79b9847 : SUCCESS in 4m 05s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/df8b0ef40d7941fa969abcb63d17fa82 : SUCCESS in 4m 04s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/475edb26d4be490fbcc12926440cba19 : FAILURE in 3m 48s