Fixed _existingEntries in BP::Loader::Mapper::MongoDB
Vastly improved performance in BP::Loader::Mapper::Elasticsearch on _existingEntries
Preparation for the change of roles in groupingColumns and incrementalColumns
Vastly improved performance in BP::Loader::Mapper::MongoDB on _existingEntries
In _bulkPrepare phase, add _type key with the concept id of the concept instance being inserted. It mimics the elasticsearch behavior, and this is helpful identifying the type of concept of the documents.
Fixed issue with conceptId
[performance] Make method checks conditional with constant, so Perl can optimize it.