Implement Test database

[EvenSol]

Is your feature request related to a problem? Please describe.
If parameters change in the main NeqSimDatabase, some test will fail, amking it neccesary to update the expected results in test every time the parameters are changed.

Describe the solution you'd like
Make a separate parameter database that will be used only for testing.

Describe alternatives you've considered
Use standard database also for testing.

Additional context