Bug 315050 [Automation][Regression]Image size is different from golden file when preview as xls
engine/org.eclipse.birt.report.engine.emitter.prototype.excel/src/org/eclipse/birt/report/engine/emitter/excel/layout/ExcelLayoutEngine.java
XlsContainer parent, int startCoordinate, int width )
	{
		Data data = createEmptyData( style );
		data.setStartX( startCoordinate );
		data.setEndX( startCoordinate + width );
		addData( data );
	}
	public void endContainer( )
	{
		setParentContainerIndex( );
		endNormalContainer( );
	}
	private void setParentContainerIndex( )
	{
		XlsContainer container = getCurrentContainer( );
		XlsContainer parent = container.getParent( );
		if ( parent != null )
			parent.setRowIndex( container.getRowIndex( ) );
	}
	public void endNormalContainer( )
	{
		XlsContainer container = getCurrentContainer( );
		if ( container.isEmpty( ) )
		{
			Data data = createData( EMPTY, container.getStyle( ) );
			ContainerSizeInfo containerSize = container.getSizeInfo( );
			data.setStartX( containerSize.getStartCoordinate( ) );
			data.setEndX( containerSize.getEndCoordinate( ) );
			addData( data );
		}