Build failed. - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/93483c73310b4eb7ac35b14a7ec9f40f : SUCCESS in 7m 40s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/ecba17deb2b848b49be8984c41368bf0 : SUCCESS in 6m 18s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/b106319a38604f61a28166fbe6702141 : FAILURE in 4m 29s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/bead578cc6494d17892ecdd56facf2ce : FAILURE in 5m 34s