recover server port in test_py_server.py

python/examples/imdb/test_py_server.py

@@ -40,10 +40,10 @@ read_op = Op(name="read", inputs=None)
 bow_op = Op(name="bow",
             inputs=[read_op],
             server_model="imdb_bow_model",
-            server_port="9292",
+            server_port="9393",
             device="cpu",
             client_config="imdb_bow_client_conf/serving_client_conf.prototxt",
-            server_name="127.0.0.1:9292",
+            server_name="127.0.0.1:9393",
             fetch_names=["prediction"],
             concurrency=1,
             timeout=0.1,