Ensures that vtkSliceAlongPolyPlane communicates the input polyline to
all ranks before attempting to probe into the dataset. Had to move the
vtkSliceAlongPolyPlane to ClientServerCore/Default since we need access
to vtkMPIMoveData filter to make it easier to communicate datasets.

Change-Id: I7ad5ce66297bb9094d0caf108af0f234eae019a5