fixed rails-jruby fortune url

rails/benchmark_config

@@ -15,9 +15,9 @@
       "json_url": "/rails/hello_world/json",
       "db_url": "/rails/hello_world/db",
       "query_url": "/rails/hello_world/db?queries=",
-      "fortune_url": "/fortune",
+      "fortune_url": "/rails/fortune",
       "port": 8080,
       "sort": 17
     }
   }]
-}
+}