Bug 136246 [regression]Export data exported error column name.
Description: Export data exported error column name. Steps to reproduce: 1. export data in a table, select several columns. Expected result: Selected column name and data are exported. Actual result: No matter what columns you selected, exported columns name always display columns beginning from the first, and then the second, and so on.
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/service/ReportEngineService.java
assert runnable != null;
		
		IRunTask runTask = null;
		synchronized ( this.getClass( ) )
		{
			runTask = engine.createRunTask( runnable );
		}
		runTask.setLocale( locale );
		runTask.setParameterValues( parameters );
		HashMap context = new HashMap( );
		
		context.put( "org.eclipse.birt.data.engine.dataset.cache.option",
				Boolean.TRUE );
		context.put( EngineConstants.APPCONTEXT_BIRT_VIEWER_HTTPSERVET_REQUEST,
				request );
		context.put( EngineConstants.APPCONTEXT_CLASSLOADER_KEY,
				ReportEngineService.class.getClassLoader( ) );
		runTask.setAppContext( context );
		
		try
		{
			runTask.run( documentName );
		}
		catch ( BirtException e )
		{
			
			AxisFault fault = new AxisFault( );
			fault
					.setFaultCode( new QName(
							"ReportEngineService.runReport( )" ) );