Build failed. https://zuul.opendev.org/t/openstack/buildset/98a647cdd0104472aa84a284f8c5d5d0 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/aa6d1bc05a8242e8a199d8a7ea78637d : SUCCESS in 3m 22s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/43449f372f094200bec46ce7c4768809 : SUCCESS in 3m 23s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/9cc855e4d8af4cd98111646827613f9f : FAILURE in 4m 24s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/8e9303e092994c5fac4ff2745c7b327d : FAILURE in 2m 54s