add infer code

recommend-model-produce/src/main/python/tools/static_ps_infer_v2.py

@@ -269,7 +269,7 @@ class Main(object):
         self.count_method = self.config.get("runner.example_count_method",
                                             "example")
 
-    def dataset_train_loop(self, epoch):
+    def dataset_train_loop(self, epoch=0):
         logger.info("Epoch: {}, Running Dataset Begin.".format(epoch))
 
         fetch_info = [