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
* 
	 * @param request
	 *            incoming http request
	 * @param parameterName
	 *            parameter name
	 * @param isUTF
	 *            is parameter in UTF-8 formator not
	 * @return
	 */
	protected static String getParameter( HttpServletRequest request,
			String parameterName, boolean isUTF )
	{
		String ISOParameterName = ( isUTF )
				? toISOString( parameterName )
				: parameterName;
		String value = request.getParameter( ISOParameterName );
		String encoding = request.getCharacterEncoding( );
		return toUTFString( value, encoding );
	}
	/**
	 * Get named parameter as integer from http request. parameter names and
	 * values are all in iso-8859-1 format in request.
	 * 
	 * @param request
	 * @param parameterName
	 * @return
	 */
	protected static int getParameterAsInt( HttpServletRequest request,
			String parameterName )
	{