Build failed. https://zuul.opendev.org/t/openstack/buildset/bd3363413d8642469c80421c4d7a8b73 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/dc2d8615826e4efeae72e06bab9c2593 : SUCCESS in 4m 10s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/950d3120a43440b8acd599a65771875f : SUCCESS in 3m 13s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/53024a30fbd348ab9f85524cafb93b4c : FAILURE in 2m 59s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/ac0f5b436d2740189053c8d1a863aa0c : FAILURE in 3m 36s