Retrieving current dataset metadata more efficient and less often.

src/main/java/nl/knaw/dans/dvingest/core/dansbag/DansBagMappingService.java

@@ -31,7 +31,7 @@ public interface DansBagMappingService {
 
     DansBagDeposit readDansDeposit(Path depositDir) throws InvalidDepositException;
 
-    Dataset getDatasetMetadataFromDansDeposit(DansBagDeposit dansDeposit, DatasetVersion updatesDataset);
+    Dataset getDatasetMetadataFromDansDeposit(DansBagDeposit dansDeposit, DatasetVersion currentMetadata);
 
     EditFiles getEditFilesFromDansDeposit(DansBagDeposit dansDeposit, String updatesDataset);