The `buildPython*` function computes name from `pname` and `version`.
This change removes `name` attribute from all expressions in
`pkgs/development/python-modules`.
While at it, some other minor changes were made as well, such as
replacing `fetchurl` calls with `fetchPypi`.
* pythonPackages.pytest-localserver: 0.3.5 -> 0.3.7
* pythonPackages.pytest-localserver: Change to use python packaging tools
* pythonPackages.pytest-localserver: Move to own file
