Bug 154178 Support projectFolder in BIRT viewer
If the report supports projectFolder, the viewer also need to enhance for this feature.
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/service/ReportEngineService.java
IRenderTask renderTask = engine.createRenderTask( reportDocument );
		HashMap context = new HashMap( );
		String format = ParameterAccessor.getFormat( request );
		if ( format.equalsIgnoreCase( ParameterAccessor.PARAM_FORMAT_PDF ) )
		{
			context.put( EngineConstants.APPCONTEXT_PDF_RENDER_CONTEXT,
					createPDFrenderContext( request.getServletPath( ) ) );
		}
		else
		{
			context
					.put( EngineConstants.APPCONTEXT_HTML_RENDER_CONTEXT,
							createHTMLrenderContext( svgFlag, request
									.getServletPath( ) ) );
		}
		context.put( EngineConstants.APPCONTEXT_BIRT_VIEWER_HTTPSERVET_REQUEST,
				request );
		context.put( EngineConstants.APPCONTEXT_CLASSLOADER_KEY,
				ReportEngineService.class.getClassLoader( ) );
		renderTask.setAppContext( context );
		
		HTMLRenderOption setting = new HTMLRenderOption( );
		setting.setOutputStream( out );
		if ( format.equalsIgnoreCase( ParameterAccessor.PARAM_FORMAT_PDF ) )
		{
			setting.setOutputFormat( IBirtConstants.PDF_RENDER_FORMAT );
			setting.setActionHandle( new ViewerHTMLActionHandler(
					reportDocument, -1, locale, false, rtl, masterPage ) );
		}