[Python-modules-team] Bug#960031: Update to non-deprecated test-suite

[Lukas Märdian]

Actually,
I looks like the test-suite used by Debian is deprecated [0].
I've prepared another patch for Ubuntu [1], which instead imports
upstream's current test-suite to debian/tests/ and makes use of it.

For some reason upstream's test/ and tests/ directories (the current
test-suite) are missing in Debian's orig.tar.gz archive... Maybe this
can be fixed with the next version bump?

Best,
  Lukas

[0] https://github.com/httplib2/httplib2/issues/166
[1] https://paste.ubuntu.com/p/T2vBYYjgpG/