Build failed. https://zuul.opendev.org/t/openstack/buildset/647ab2e4193e44c287fbd0207abf551c - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/aa03abeb40fd4cf687539f08b66c3e61 : SUCCESS in 9m 17s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/82c10a57046e43f0876e60e2c697cb54 : SUCCESS in 4m 31s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/a63bff377c064f109199c7ca8787c50f : SUCCESS in 4m 15s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/723c6697302c4f1eb3db761c054ab240 : FAILURE in 4m 18s