调式代码，pusher，fetcher的框架可以跑起来了
entire project status was changed because logger was reocde
涉及log的代码调整
去掉注释，打开port的逻辑功能
1. add consle script for cds-agent
2. rename cds-agent.py. turn cds-agent.py into cds-agent.py
3. modify mongodb client
4. remodify fetcher  desige logic
5. to do not test plugins/cds_fetch and cds_push