Build failed. https://zuul.opendev.org/t/openstack/buildset/b873b066a07e4818a2d1ec6e59c2b367 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/d111e2963d374390957336ecc24974b0 : SUCCESS in 4m 20s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/0c9ce3aca42041deae254c64e5d24c5d : SUCCESS in 3m 48s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/90d89c12c8f04196a0acf7c95a2782f2 : SUCCESS in 3m 47s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/f1b7188f78864d95be163e1ffebfbade : FAILURE in 4m 42s