save model

recommend-model-produce/src/main/python/tools/static_ps_trainer_v2.py

@@ -243,7 +243,7 @@ class Main(object):
                     [self.inference_target_var], self.exe)
 
         if fleet.is_first_worker():
-            model_dir = "{}/{}".format(save_model_path, epochs)
+            model_dir = "{}/{}".format(save_model_path, epochs - 1)
             oss_object_name = self.config.get("runner.oss_object_name", "dyp/dnn_plugin_new.tar.gz")
             # trans to new format
             # {"model_filename":"", "params_filename":""} fleet每个参数一个文件，需要同这种方式加载