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
public void endTable( IContent content )
	{
		if ( !tables.isEmpty( ) )
		{
			tables.pop( );
			endContainer( );
		}
	}
	public void addContainer( IStyle style, HyperlinkDef link )
	{
		XlsContainer parent = getCurrentContainer( );
		ContainerSizeInfo sizeInfo = parent.getSizeInfo( );
		StyleEntry entry = engine.createEntry( sizeInfo, style,
												getParentStyle( parent ) );
		addContainer( new XlsContainer( entry, sizeInfo, parent ) );
	}
	private StyleEntry getParentStyle( XlsContainer parent )
	{
		return parent == null ? null : parent.getStyle( );
	}
	private void addContainer( XlsContainer child )
	{
		XlsContainer parent = child.getParent( );
		if ( parent instanceof XlsCell )
		{
			addEmptyDataToContainer( child, parent );
		}
		if ( parent != null )
		{
			parent.setEmpty( false );