STYLE : try/catch blocs supression in visu testing.

Testing/Code/Visu/otbAlternateViewerTest.cxx

Testing/Code/Visu/otbDoubleImageViewerWithLink.cxx

Testing/Code/Visu/otbFixedSizeFullImageWidget.cxx

Testing/Code/Visu/otbFixedSizeFullImageWidgetNew.cxx

Testing/Code/Visu/otbFullResolutionImageWidget.cxx

Testing/Code/Visu/otbFullResolutionImageWidgetNew.cxx

Testing/Code/Visu/otbImageToGrayscaleAnaglyphImageFilter.cxx

...g/Code/Visu/otbImageToGrayscaleAnaglyphImageFilterNew.cxx

Testing/Code/Visu/otbImageViewer.cxx

Testing/Code/Visu/otbImageViewerNew.cxx

Testing/Code/Visu/otbImageViewerWithMultiBandFilter.cxx

Testing/Code/Visu/otbImageViewerWithOtbImage.cxx

Testing/Code/Visu/otbImageWidgetBaseNew.cxx

...e/Visu/otbVectorImageToColorAnaglyphVectorImageFilter.cxx

...isu/otbVectorImageToColorAnaglyphVectorImageFilterNew.cxx

Testing/Code/Visu/otbZoomableImageWidget.cxx