Use auto-unboxing instead of manual unboxing

Change-Id: I50c66b1b63729bff2c4b3416664f391f2e900bd3
diff --git a/apps/segmentrouting/src/main/java/org/onosproject/segmentrouting/grouphandler/DefaultGroupHandler.java b/apps/segmentrouting/src/main/java/org/onosproject/segmentrouting/grouphandler/DefaultGroupHandler.java
index 3ff0e35..9bbde2f 100644
--- a/apps/segmentrouting/src/main/java/org/onosproject/segmentrouting/grouphandler/DefaultGroupHandler.java
+++ b/apps/segmentrouting/src/main/java/org/onosproject/segmentrouting/grouphandler/DefaultGroupHandler.java
@@ -313,13 +313,13 @@
                 return -1;
             } else {
                 log.debug("getNextObjectiveId in device{}: Next objective id {} "
-                    + "created for {}", deviceId, nextId.intValue(), ns);
+                    + "created for {}", deviceId, nextId, ns);
             }
         } else {
             log.trace("getNextObjectiveId in device{}: Next objective id {} "
-                    + "found for {}", deviceId, nextId.intValue(), ns);
+                    + "found for {}", deviceId, nextId, ns);
         }
-        return nextId.intValue();
+        return nextId;
     }
 
     /**