Allow the port of the server to be set at initialization

[Olaf Meuwese]

Problem
The server port is now always random, making it sometimes hard to set the connection url in tests, (for instance in properties) because the port number is not determined before runtime.

Cause
The constructor method now always uses the port from the _get_free_port() method.

Solution
Add parameter to the constructor method. If none is provided, fall back to the _get_free_port() method. This should be backwards compatible.

[Olaf Meuwese]

Willing to work on this, however I wanna know if the vision on this issue is shared by the maintainers.

[Cody Lee]

@OlafMeuwese PR's welcome :)

[Abhiman N]

Is this being worked upon?

[Cody Lee]

fixed and released in 2.0.0