This reverts commit 4dd38c42894c61358b9b0f56fe7838b045a157eb.
Disabling the test suite is unnecessary; I fixed it with
4dd38c42894c61358b9b0f56fe7838b045a157eb.
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`.
