BUG: Making sure that the vtkXdmfReader2 behaves like the old reader when it comes to 2D/3DCoRectMesh and uses vtkImageData instead of vtkUniformGrid.
BUG: Making sure that the vtkXdmfReader2 behaves like the old reader when it
comes to 2D/3DCoRectMesh and uses vtkImageData instead of vtkUniformGrid.

cjh1/Xdmf2,cjh1/Xdmf2,cjh1/Xdmf2