Build failed. https://zuul.opendev.org/t/openstack/buildset/b91fe4fcc13e4717af67158434c28813 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/8b55380625ff45248429af7c09710375 : SUCCESS in 3m 19s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/039dce6bda5347ec95b4360bab482278 : SUCCESS in 3m 31s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/b926cf785a844871a04fd133a65f463f : SUCCESS in 3m 58s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/9d96068825bd40f189d656706ba4ffd2 : FAILURE in 2m 32s