Build failed. https://zuul.opendev.org/t/openstack/buildset/bed80fcd7bde4a9c825a5f3555b627b4 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/84b158fe93e24e5ba5fe5f3ff4595eaa : SUCCESS in 4m 47s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/1dea4e42d509403c976a419268db10f6 : SUCCESS in 5m 09s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/2fc94636f2b54068aab42e96c948ddf0 : SUCCESS in 5m 05s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/628fbfe2457a45d5a68109283cf79a1a : FAILURE in 4m 31s