Build failed. https://zuul.opendev.org/t/openstack/buildset/d2651c9160074d09bdd46f8cf8ebc3ca - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/660c6cbad3fb4f3bbe9412c22cb1f039 : SUCCESS in 4m 51s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/48b283ca1ae341c397b8398d40ee44ea : SUCCESS in 6m 38s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/ed49ec952b7f43a0a4175377816af710 : SUCCESS in 7m 02s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/79a3f3ffbb634c7b98314f64af707c6c : FAILURE in 4m 39s