Build failed. https://zuul.opendev.org/t/openstack/buildset/3d9ff6a52a1c435bb3c3ac5f381b7b13 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/2db20220f71b4d13b4f9b1753804cf38 : SUCCESS in 5m 07s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/5df36e61b6df43b1b4425c7b6798eb6a : FAILURE in 3m 32s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/6fd92a42730d489fb0f3931d303e1d06 : SUCCESS in 4m 40s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/b61bb40a3f8448d09cc942288705cb2b : SUCCESS in 4m 49s