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
*            locale string
	 * @return report locale
	 */
	public static Locale getLocaleFromString( String locale )
	{
		if ( locale == null || locale.length( ) <= 0 )
		{
			return null;
		}
		int index = locale.indexOf( '_' );
		if ( index != -1 )
		{
			String language = locale.substring( 0, index );
			String country = locale.substring( index + 1 );
			return new Locale( language, country );
		}
		return new Locale( locale );
	}
	/**
	 * Get report locale in string.
	 * 
	 * @param request
	 *            http request
	 * @return report String
	 */
	public static String getLocaleString( HttpServletRequest request )
	{
		return getParameter( request, PARAM_LOCALE );
	}
	/**