SSDM-4925: Changing NullBridge constant to NULLNULL.

SVN: 38074

openbis/source/java/ch/systemsx/cisd/openbis/generic/shared/dto/hibernate/NullBridge.java

@@ -24,7 +24,7 @@ import org.hibernate.search.bridge.builtin.LongBridge;
 public class NullBridge extends LongBridge
 {
 
-    public static final String NULL = "NULL";
+    public static final String NULL = "NULLNULL";
 
     @Override
     public String objectToString(Object object)