Sonar fixes

Change-Id: Id9209ef62897df0f70f0409053ed3ef90e5f18df
diff --git a/app/src/main/java/org/onosproject/segmentrouting/pwaas/L2TunnelHandler.java b/app/src/main/java/org/onosproject/segmentrouting/pwaas/L2TunnelHandler.java
index 294134e..d3b95b4 100644
--- a/app/src/main/java/org/onosproject/segmentrouting/pwaas/L2TunnelHandler.java
+++ b/app/src/main/java/org/onosproject/segmentrouting/pwaas/L2TunnelHandler.java
@@ -161,7 +161,7 @@
             return nextId;
         }
 
-        public void setNextId(int nextId) {
+        protected void setNextId(int nextId) {
             this.nextId = nextId;
         }