Build failed. https://zuul.opendev.org/t/openstack/buildset/2649e6b61040456ca4e4d14dcfe2a779 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/77b35a73d25c4fda91db2f2cf880b5ce : SUCCESS in 5m 03s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/4eb44ec07380400fb9b95a074a78d68d : SUCCESS in 5m 34s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/c2a77d20423745668a040364df6f868f : SUCCESS in 4m 31s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/967cdc07084442fda91daeafe0b00287 : FAILURE in 5m 09s