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
* 
	 * @return
	 */
	private PDFRenderContext createPDFrenderContext( )
	{
		PDFRenderContext renderContext = new PDFRenderContext( );
		renderContext.setBaseURL( this.contextPath + "/frameset" ); 
		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, ServletOutputStream outputStream,
			String format, Locale locale, HashMap parameters,
			boolean masterPage, boolean svgFlag ) throws RemoteException
	{
		assert runnable != null;
		
		HTMLRenderOption option = new HTMLRenderOption( );
		option.setOutputStream( outputStream );