Load and Stress Test

[ShayHav]

Add automatics test:

• [ ] Dealing with 100 various requests such as registration, login etc.
• [ ] Support 1000 open shops, each with 1,000 products on average, 10,000 registered users and keep history of 1,000,000 orders.
• [ ] support 1,000 visitors in the market in every given time.
• [ ] the market keep working even when unexpected event happened such as network failure and disconnection to external services.