Build failed. https://zuul.opendev.org/t/openstack/buildset/dcf621b172d64c30ac0ee0c6d8b9e7fc - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/38308790690d40c694a697dce928d861 : SUCCESS in 3m 31s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/8826e1c35eba4cd7b3adce18b82c1065 : SUCCESS in 2m 45s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/575e43ed038a439b9f8d7a501aeaf6da : FAILURE in 3m 07s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/8d1e2d84a59f442295eb9a85403b829e : FAILURE in 2m 33s