Refactor throughput calibration tests
Summary
The throughput calibration unit tests need to be refactored, as they test multiple functionalities within the same function, thus becoming hard to debug. Furthermore, we need to ensure the compatibility of CalibPipe with a given (minimum) version of sqlalchemy.
What is the expected correct behavior?
Smaller unit tests ensuring that all the functionalities of the throughput calibrator and its interaction with the CalibPipe DataBase work properly.