SONAR suggestions - prevent truncation of arithmetic expressions

Change-Id: I4694c0c3183b991a4f0db793f584bc77a5fb7d60
diff --git a/src/main/java/org/onosproject/segmentrouting/DefaultRoutingHandler.java b/src/main/java/org/onosproject/segmentrouting/DefaultRoutingHandler.java
index fd57f09..72243bb 100644
--- a/src/main/java/org/onosproject/segmentrouting/DefaultRoutingHandler.java
+++ b/src/main/java/org/onosproject/segmentrouting/DefaultRoutingHandler.java
@@ -64,7 +64,7 @@
  */
 public class DefaultRoutingHandler {
     private static final int MAX_CONSTANT_RETRY_ATTEMPTS = 5;
-    private static final int RETRY_INTERVAL_MS = 250;
+    private static final long RETRY_INTERVAL_MS = 250L;
     private static final int RETRY_INTERVAL_SCALE = 1;
     private static final long STABLITY_THRESHOLD = 10; //secs
     private static final int UPDATE_INTERVAL = 5; //secs