Build failed. https://zuul.opendev.org/t/openstack/buildset/9c50be0d1aca4632a01c20e1727b7fed - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/034c5d472d3844b899c168878f9a62d0 : FAILURE in 3m 56s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/67e9602139764ffc956a2b9b4b19b3eb : FAILURE in 3m 52s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/46bd22e320ab47bfbb5e2ab11cbc4e9b : FAILURE in 3m 44s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/8f315e05b59c4ed385e49c7496799973 : FAILURE in 3m 45s