Build failed. https://zuul.opendev.org/t/openstack/buildset/7220cc76d75743c9bf57939f2074570a - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/245dd2672d1146c3b4727fd0b4b9d515 : SUCCESS in 3m 00s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/7d82286ee88b4dbcb22c3936a545cdc4 : SUCCESS in 2m 50s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/614ec14b3829464d8b16ce2ab46412ce : SUCCESS in 2m 40s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/5a573c6172384aac94fb57e90303c451 : FAILURE in 3m 01s