examples: Random load balancer strategy uses the updated strategy API of NFD

Change-Id: I3a12ccf29f4858049d1021a3e421e1c7151b3ac1
diff --git a/examples/ndn-load-balancer/random-load-balancer-strategy.cpp b/examples/ndn-load-balancer/random-load-balancer-strategy.cpp
index 4b1585f..ac4eff4 100644
--- a/examples/ndn-load-balancer/random-load-balancer-strategy.cpp
+++ b/examples/ndn-load-balancer/random-load-balancer-strategy.cpp
@@ -94,7 +94,7 @@
     }
   } while (!canForwardToNextHop(inFace, pitEntry, *selected));
 
-  this->sendInterest(pitEntry, selected->getFace());
+  this->sendInterest(pitEntry, selected->getFace(), interest);
 }
 
 } // namespace fw