SSDM-4725: store an empty string for 'location' in path info db

SVN: 37908

datastore_server/source/java/ch/ethz/sis/openbis/generic/server/dssapi/v3/DataStoreServerApi.java

@@ -308,7 +308,7 @@ public class DataStoreServerApi extends AbstractDssServiceRpc<IDataStoreServerAp
             List<DataSetFileCreation> files = newDataSets.get(i).getFileMetadata();
 
             long dataSetId =
-                    dao.createDataSet(permId, "External system(s)");
+                    dao.createDataSet(permId, "");
             try
             {
                 dao.createDataSetFiles(PathInfoDTOCreator.createPathEntries(dataSetId, permId, files));