Bug 183733 Implement the IScriptOjectClassInfo to provide the class infromation to support the JS code assistant.
Engine should implement the IScriptObjectClassInfo interface to return the class information for script object.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/script/internal/LabelScriptExecutor.java
{
		try
		{
			ReportItemDesign labelDesign = ( ReportItemDesign ) content
					.getGenerateBy( );
			ILabelInstance label = new LabelInstance( content, context );
			if ( handleJS( label, labelDesign.getOnRender( ), context )
					.didRun( ) )
				return;
			ILabelEventHandler eh = getEventHandler( labelDesign, context );
			if ( eh != null )
				eh.onRender( label, context.getReportContext( ) );
		} catch ( Exception e )
		{
			addException( context, e );
		}
	}
	public static void handleOnPageBreak( ILabelContent content,
			ExecutionContext context )
	{
		try
		{
			ReportItemDesign labelDesign = ( ReportItemDesign ) content
					.getGenerateBy( );
			ILabelInstance label = new LabelInstance( content, context );
			if ( handleJS( label, labelDesign.getOnPageBreak( ), context )
					.didRun( ) )
				return;
			ILabelEventHandler eh = getEventHandler( labelDesign, context );
			if ( eh != null )