code: public static List<String> getAvailableLocaleSuffixesForBundle(
  			String messageBundlePath,
  			GrailsServletContextResourceReader rsReader) {
  
  		return getAvailableLocaleSuffixesForBundle(messageBundlePath,
  				MSG_RESOURCE_BUNDLE_SUFFIX, rsReader);
  	}
docs: Returns the list of available locale suffixes for a message resource
  bundle
  
  @param messageBundlePath
  the resource bundle path
  @param rsReader
  the grails servlet context resource reader
  @return the list of available locale suffixes for a message resource
  bundle