[FEATURE] Create test for db auction

# Changelog:
Add a part of test (test of DB auction)
# Motivation:
I developed an one auction 10 years ago. I want to share the experience.
# Usage guide:
Code for creating the table can be used in node/setup_db.py
# Roadmap:
* test_auction.py (DB,node/auction,FrontEnd api,protocol, etc.),
* DB(node/setup_db.py), 
* node/auction.py, 
* etc.

@gubatron, welcome to the real world :-) If you had your shop, as some of us, you would understand me.