public class CustomRefinementConfiguration
extends CommerceRefinementConfiguration
This class extends the commerceRefinementConfiguration class to add custom catalog
 specific properties.
 This class provides getter and setter methods for each of the properties in a 
 'commerceRefinementConfiguration' item descriptor.
 It can be populated from a 'customRefinementConfiguration' repository item by creating a new
 CustomRefinementConfiguration object and then calling the
 populateCustomRefinementConfiguration() method in the
 CustomRefinementConfigurationPropertyManager.
 Also a MutableRepositoryItem can be populated with values from an object of this class
 by calling the populateRepositoryItem() method in the 
 CustomRefinementConfigurationPropertyManager.