Bug 135497 Data Type is not correct when "Generate All" for Data item
Description: Create a sample datasource and dataset. Insert a data into layout, bind with the dataset.Click "Generate All" to get the Data Binding columns, but the displayed data type is not consistent with the actual one.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/editors/schematic/editparts/ImageEditPart.java
{
	private static final String IMG_TRANS_MSG = Messages.getString( "ImageEditPart.trans.editImage" ); 
	/**
	 * Constructor
	 * 
	 * @param model
	 */
	public ImageEditPart( Object model )
	{
		super( model );
	}
	/**
	 * @return Returns the handle.
	 */
	public ImageHandleAdapter getImageAdapter( )
	{
		return (ImageHandleAdapter) getModelAdapter( );
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.gef.editparts.AbstractGraphicalEditPart#createFigure()
	 */
	protected IFigure createFigure( )