Build failed. https://zuul.opendev.org/t/openstack/buildset/ab6d657a441845bfb2789c8c8b4c7714 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/29854a46c4174efe811b438f774286a0 : FAILURE in 3m 22s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/28973d78ac9140dab1c0a7187cb72860 : SUCCESS in 3m 29s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/293e9cb2415842dea37ad1cb453319e7 : SUCCESS in 3m 16s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/0d2bec1bf18440c8b1e665821e3728a6 : SUCCESS in 3m 38s