Bug 143671 [Linux-As][Smoke]Parameter can't be used.
Details: [Linux-As]Parameter can't be used. Setp: 1.New a report design. 2.New a paremeter. 3.Preview and click Run Report Parameter. 4.Dialog pop up and press OK. Actual resutl: Report error.
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/utility/ParameterAccessor.java
* 
	 * @param request
	 *            http request
	 * @return report file name
	 * @throws AxisFault
	 */
	public static String getReportDocument( HttpServletRequest request )
	{
		String filePath = getParameter( request, PARAM_REPORT_DOCUMENT );
		filePath = preProcess( filePath );
		if ( "".equals( filePath ) ) 
		{
			filePath = generateDocumentFromReport( request );
			filePath = createDocumentPath( filePath, request );
		}
		else
		{
			filePath = createAbsolutePath( filePath );
		}
		return filePath;
	}
	/**
	 * Create the file path of the the document. The document will be put under
	 * the working folder birt document directory based on different session id.
	 * 
	 * @param filePath
	 *            the document path cretaed from the report design file.
	 * @param request
	 *            Http request, used to get the session Id.
	 * @return