test_interest_aggregation: explicitly set strategy to best-route v1

refs #2621

Change-Id: I607ad445bd264aec1e281341cbb4532f057cfbf3
diff --git a/test_interest_aggregation/test_interest_aggregation.py b/test_interest_aggregation/test_interest_aggregation.py
index 1906bfa..e93850b 100644
--- a/test_interest_aggregation/test_interest_aggregation.py
+++ b/test_interest_aggregation/test_interest_aggregation.py
@@ -70,6 +70,12 @@
         self.startNfd()
         time.sleep(1)
 
+        #Set NFD to use best-route v1 strategy
+        self.startProcess("nfdc",
+            ["nfdc", "set-strategy", "/", "ndn:/localhost/nfd/strategy/best-route/%FD%01"],
+            "-> Setting strategy to best-route v1")
+        time.sleep(1)
+
         #Start ndn-traffic-server to serve ndn:/test-agg, with content delay set to 2000ms
         serverConfigurationFile = os.path.abspath(
             "test_interest_aggregation/test-traffic-server.conf")