setup: Python-3.4 support

Signed-off-by: Tibor Simko <tibor.simko@cern.ch>
With a few modifications and playing with returning/raising SkipTest, things were working on my box, but not on Travis-CI.  The best would be to simply return SkipTest during test case class construction; that works well both locally and on Travis.  Since we don't have any tests left, it does not matter anyway.  I'll merge it that way.