Scalar type not updated correctly in image filters that modify only input information.

This issue was created automatically from an original Mantis Issue. Further discussion may take place here.

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Image filters that don't change in the image data, only information content (e.g. vtkImageChangeInformation, vtkExtractVOI, vtkImageTranslateExtent, and vtkImageClip), do not update the output scalar type when the scalar type of the input image is changed. The output scalar type becomes current after the pipeline executes before the mentioned filters.