Build failed. https://zuul.opendev.org/t/openstack/buildset/cb486af06bcd486ab8ed4c40a5418c91 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/4321c376ff35496cb327b60dd68d3cb1 : SUCCESS in 2m 43s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/a67f35fe058040cca156207c5449e1ef : SUCCESS in 2m 54s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/904d6498c1504076afc3fa79d3f0155a : SUCCESS in 2m 49s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/6e7185683e414d628693b96660d7d840 : FAILURE in 2m 43s