Bug 158935 [2.2.0][Smoke]PDF can not preview anything by IE
Details: [2.2.0][Smoke]PDF can not preview anything by IE Step: 1.New a report and add a label 2.Preview as PDF Actual resutl: Can not preview anything Excepted resutl: Preview the label by PDF
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/servlet/BirtEngineServlet.java
*/
	private static final long serialVersionUID = 1L;
	
	/**
	 * Local initialization.
	 * 
	 * @return
	 */
	protected void __init( ServletConfig config )
	{
		IViewerReportService instance = new BirtViewerReportService( config );
		BirtReportServiceFactory.init( instance );
		engine = new EngineFragment( );
		
		requester = new RequesterFragment( );
		requester.buildComposite( );
		requester.setJSPRootPath( "/webcontent/birt" ); 
	}
	
	/**
	 * Init context.
	 * 
	 * @param request incoming http request
	 * @return
	 */
	protected IContext __getContext( HttpServletRequest request, HttpServletResponse response )
	{
		InputOptions options = new InputOptions( );
		options.setOption( InputOptions.OPT_REQUEST, request );
		BirtReportServiceFactory.getReportService( ).setContext(