Created by: reyoung

https://github.com/PaddlePaddle/Paddle/blob/d883547bf072f1edd05eb52854e56970b50e7203/python/paddle/v2/fluid/framework.py#L487-L492

The Program.clone only clone the variables and ops in the program into a new program. However, the information of Parameter is not clone.

So we need restore the information of Parameters.