Build failed. https://zuul.opendev.org/t/openstack/buildset/d2609b7fcd6049f19296c70bdb9880cc - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/8444057d2e8441be81c3b04f7311c150 : SUCCESS in 3m 48s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/c34c96c6eb0b48209da84587c6055d6b : FAILURE in 3m 40s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/a2a5ba4607314bbfb08fd6fba140cf3b : SUCCESS in 3m 39s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/7939d7ee148b47b4b5bd15d05c6d0e4d : SUCCESS in 3m 42s