[Broker API] Order being executed off hours in Sandbox

**Is your feature request related to a problem? Please describe.**
Development slows down when order aren't executed off hours. This means if you are developing the order feature, it's only possible during stock exchange opening hours. This slows everything down and since everything is fake, it's not really important what price orders are executed on.

**Describe the solution you'd like**
Add an API request where Order can be executed off hours.