Feature request: move away from using a global variable for DEFAULT_FIN_MODEL in the tests

[jaredthomas68]

Move away from using a global variable for DEFAULT_FIN_MODEL in the tests

I'd like to have use move away from global variables.

Proposed solution

We could use functions and/or .yaml files instead of global variables

Alternatives considered

Functions in a test module, input files, or local defaults for each test file instantiated inside each file (I don't like this option).

Additional context

The global variable DEFAULT_FIN_MODEL was edited in one test and all tests passed locally but for some reason the CI test run allowed the global variable change in the one file to impact the other tests, making it difficult to track down why the tests were failing.