Bug 138828 Export data column are disordered
Steps to reproduce: 1.Add a sample data source and a data set with table "CUSTOMERS" 2.Preview in Web Viewer 3.Click "Export data", choose columns "CUSTOMERNAME","PHONE","CITY","STATE" to be exported, click "OK" Expected result: The exported columns is alphabetic order or the same order as selected columns Actual result: The exported columns is disordered. they are "STATE","CITY","CUSTOMERNAME","PHONE".
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/service/ReportEngineService.java
isEmbeddable = true;
		setting.setEmbeddable( isEmbeddable );
		setting.setInstanceIDs( activeIds );
		setting.setMasterPageContent( masterPage );
		setting.setActionHandle( new ViewerHTMLActionHandler( reportDocument,
				pageNumber, locale, isEmbeddable ) );
		renderTask.setRenderOption( setting );
		renderTask.setLocale( locale );
		
		try
		{
			renderTask.setPageNumber( pageNumber );
			renderTask.render( );
		}
		catch ( BirtException e )
		{
			AxisFault fault = new AxisFault( );
			fault.setFaultCode( new QName(
					"ReportEngineService.renderReport( )" ) ); 
			fault.setFaultString( e.getLocalizedMessage( ) );
			throw fault;
		}
		catch ( Exception e )
		{
			AxisFault fault = new AxisFault( );
			fault.setFaultCode( new QName(
					"ReportEngineService.renderReport( )" ) ); 
			fault.setFaultString( e.getLocalizedMessage( ) );
			throw fault;
		}