Fixed sonar suggestion in l2handler

Change-Id: Ia16e6197c36b3bebed4610c40624fa180a4b9385
diff --git a/apps/segmentrouting/app/src/main/java/org/onosproject/segmentrouting/pwaas/L2TunnelHandler.java b/apps/segmentrouting/app/src/main/java/org/onosproject/segmentrouting/pwaas/L2TunnelHandler.java
index 2f7fa32..294134e 100644
--- a/apps/segmentrouting/app/src/main/java/org/onosproject/segmentrouting/pwaas/L2TunnelHandler.java
+++ b/apps/segmentrouting/app/src/main/java/org/onosproject/segmentrouting/pwaas/L2TunnelHandler.java
@@ -137,7 +137,7 @@
         private final String description;
 
         private String specificError;
-        public int nextId;
+        private int nextId;
 
         Result(int code, String description) {
             this.code = code;
@@ -157,6 +157,14 @@
             return description;
         }
 
+        public int getNextId() {
+            return nextId;
+        }
+
+        public void setNextId(int nextId) {
+            this.nextId = nextId;
+        }
+
         @Override
         public String toString() {
             return code + ": " + description;