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
/**
	 * Create PDF render context.
	 * 
	 * @return
	 */
	private PDFRenderContext createPDFrenderContext( )
	{
		PDFRenderContext renderContext = new PDFRenderContext( );
		renderContext.setBaseURL( this.contextPath
				+ IBirtConstants.SERVLET_PATH_RUN );
		renderContext.setSupportedImageFormats( "PNG;GIF;JPG;BMP" ); 
		return renderContext;
	}
	/**
	 * Run and render a report,
	 * 
	 * @param runnable
	 * @param outputStream
	 * @param format
	 * @param locale
	 * @param parameters
	 * @param svgFlag
	 * @throws IOException
	 */
	public void runAndRenderReport( HttpServletRequest request,
			IReportRunnable runnable, OutputStream outputStream, String format,
			Locale locale, Map parameters, boolean masterPage, boolean svgFlag )
			throws RemoteException
	{
		runAndRenderReport( request, runnable, outputStream, format, locale,