Removing invalid test [github #17]
Removing invalid test [github #17]

- Effectively removes:
  Image.SwapImageHandle/78/_U1_/rand/sz=16x16/VX_DF_IMAGE_U1/ROI=true
  by making it skip the test logic and pass.
- This is because for such a small width (16) U1 has to be on byte boundary,
  and start must be smaller than stop.  The image is too small to test this,
  and the current test fails when the sample implementation is corrected for
  a bug.

KhronosGroup/OpenVX-cts,KhronosGroup/OpenVX-cts,KhronosGroup/OpenVX-cts,KhronosGroup/OpenVX-cts