Build failed. https://zuul.opendev.org/t/openstack/buildset/535368deae404e01af3ae82e991a0f97 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/dbe356e0b6b24a17a9a6059361cfd63e : SUCCESS in 4m 05s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/680cbb1237044a6dbc0e3fb64b2d79e0 : SUCCESS in 4m 57s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/6ac7102b5c0f49a7bf878b4b8ca1628a : SUCCESS in 4m 20s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/8bce80b841174ea3975da73970fac32a : FAILURE in 3m 56s