only use MapStore/MapLoader for saving/loading IndexEvent objects. No need to use a listener since there is only the single node -- all entries are persisted to DB using the hazelcast.xml config we have for the map. https://projects.ecoinformatics.org/ecoinfo/issues/5944
upgrade to Metacat 2.1.0 on the trunk. This includes a new index_event table for storing indexing events that need to be reprocessed. https://projects.ecoinformatics.org/ecoinfo/issues/5944
stub for storing IndexEvent objects in Metacat (from metacat-index processing). https://projects.ecoinformatics.org/ecoinfo/issues/5944