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/utility/ParameterAccessor.java
* protected routines
	 **************************************************************************/
	/**
	 * Checks if a given file name is a relative path.
	 * 
	 * @param fileName
	 *            The file name.
	 * @return A <code>boolean</code> value indicating if the file name is a
	 *         relative path or not.
	 */
	public static boolean isRelativePath( String fileName )
	{
		return !new File( fileName ).isAbsolute( );
	}
	/**
	 * Check whether report parameter exists in the url.
	 * 
	 * @param request
	 *            http request
	 * @param name
	 *            parameter name
	 * @return whether report parameter exists in the url
	 */
	public static boolean isReportParameterExist( HttpServletRequest request,
			String name )
	{
		assert request != null && name != null;
		boolean isExist = false;
		Map paramMap = request.getParameterMap( );
		String ISOName = toISOString( name );