Build failed. https://zuul.opendev.org/t/openstack/buildset/6b4a2cb7c6b64e29b9728c28dfa038c0 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/fd8ec12b491143af80b59c22c8cb2210 : SUCCESS in 3m 47s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/f9840d6e82b64d4184cf2c2d3ff5ef00 : SUCCESS in 5m 21s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/3f22a969207842e59d1fd3e35b688b6e : SUCCESS in 5m 04s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/26d9d64c62f74b43a29c559d4938658a : FAILURE in 3m 39s