Should we remove ICatalog.getGenericMap()?

[MikeHopcroft]

This method is exposing internal implementation details of implementations of ICatalog. The only user seems to be IRuleChecker. Consider coupling RuleChecker to ICatalog, but making RuleChecker constructor take ICatalog as parameter.

This issue came up while reviewing a unit test for ICatalog.getGenericMap(). It is hard to write a satisfactory unit test for this function (need to deep compare Map) and the functionality is tested in other ICatalog methods.