Updated CollectedVolumeImExporter to comply with updated interface

sci-publications/src/main/java/org/scientificcms/publications/CollectedVolumeImExporter.java

@@ -23,4 +23,12 @@ public class CollectedVolumeImExporter
         // Nothing
     }
 
+    @Override
+    protected void updateExistingPublicationWithPublisher(
+        final CollectedVolume existingPublication,
+        final CollectedVolume withImportedPublication
+    ) {
+        // Nothing to update
+    }
+
 }