Build failed. https://zuul.opendev.org/t/openstack/buildset/ded6a95431cd4090ae51178c8ec41a39 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/bc3cf840997146709bb11ba10e161957 : SUCCESS in 3m 56s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/998580d4eabc487a95a58135fc3189cb : SUCCESS in 4m 54s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/aadbc34f47424012aaa4ced2ea040f1d : SUCCESS in 4m 41s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/20b6e4e9e1964048a0303c990dd08204 : FAILURE in 3m 57s