add: SampleRelationRecord to friend classes

SVN: 17181

openbis/source/java/ch/systemsx/cisd/openbis/generic/server/business/bo/samplelister/SampleListingWorker.java

@@ -80,7 +80,8 @@ import ch.systemsx.cisd.openbis.generic.shared.dto.identifier.SampleIdentifier;
  * @author Bernd Rinn
  */
 @Friend(toClasses =
-    { ExperimentProjectGroupCodeRecord.class, SampleRecord.class, ISampleListingQuery.class })
+    { ExperimentProjectGroupCodeRecord.class, SampleRecord.class, SampleRelationRecord.class,
+            ISampleListingQuery.class })
 final class SampleListingWorker
 {
     private final static Logger operationLog =