Fix SONAR problems

Change-Id: Id79866971b7b2c894babe45a69f22f44cf3584db
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 3a89a21..044ad41 100644
--- a/app/src/main/java/org/onosproject/segmentrouting/pwaas/L2TunnelHandler.java
+++ b/app/src/main/java/org/onosproject/segmentrouting/pwaas/L2TunnelHandler.java
@@ -129,7 +129,7 @@
 
         private final int code;
         private final String description;
-        public int nextId;
+        protected int nextId;
 
         Result(int code, String description) {
             this.code = code;