Bill Lorensen authored Feb 28, 2013 and David Gobbi committed Feb 28, 2013

TestParametricFunctions.py existed in two modules. The version in
Filters/Sources used random numbers to populate the splines. This was
undesirable for producing consistent results across platforms.

The version in Common/ComputationalGeometry uses explicit points and
matches the points in the corresponding .tcl test.

Also, the .tcl and .py tests had different image tolerances. This
patch unifies those tolerances.

There are currently four baselines for these tests. Once merged, we
will remove all of the alternate baselines.

Change-Id: Ie09a6a27e0856596fcda2df7cec2d11ee279ed78