try: cleanup resources at the end of test

Author: pawankartik-elastic

server/src/internalClusterTest/java/org/elasticsearch/indices/cluster/RemoteSearchForceConnectTimeoutIT.java

@@ -120,6 +120,7 @@ public void testTimeoutSetting() {
             );
             assertThat(failureReason, Matchers.containsString("SubscribableListener"));
             latch.countDown();
+            result.decRef();
         }
     }
 }