ENH: Reduce verbosity of RunExamples.py.

Change-Id: Iffa28d03068a9f7b314d2c67e149105da4512c73
BUG: Do not include RegistrationITKv4 example sources in the build.

The duplicates result in errors in the build.  THe RegstrationITKv4 do not
have all the required examples.

Change-Id: Idea5749a202e576f5262d99be21297caf5eb4ccc