Build failed. https://zuul.opendev.org/t/openstack/buildset/f95ebf81bc7a49d78efc85a4bb985632 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/18161c72624f419ea51db2bdd095cc5a : SUCCESS in 3m 30s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/6270f00e66004f2f92699be31e4c1eb1 : SUCCESS in 3m 38s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/be0a15fa029d492fb391d995141032fb : SUCCESS in 2m 56s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/633e7747b08c4d839cf650646f285687 : FAILURE in 3m 46s