vulture: Convert to distutils-r1
Add execnet from main tree, add Python 3 support
pytest-xdist: Convert to distutils-r1
gcp: Convert to distutils-r1
execnet: Add missing Manifest
gcp: Add missing setuptools
calabash: Convert to distutils-r1
jsonpipe: Convert to distutils-r1
wokkel: Convert to distutils-r1