Revert "return full paths for python source unit (bug fix)"
Revert "return full paths for python source unit (bug fix)"

This reverts commit 7c4043e8b3b7af5d125379e7fcb1cc44ef70a8a1.

alexsaveliev/srclib-ruby,alexsaveliev/srclib-ruby,alexsaveliev/srclib-ruby,alexsaveliev/srclib-ruby,alexsaveliev/srclib-ruby,alexsaveliev/srclib-ruby