CIDEVSTC-278 - Adds test to verify parameter functions can be added to coverage

The functionality to append parameters is there, I think there's an issue with it when it comes to complex coverages but as far as parameter functions go, it appears to work globally. This test proves that it works for Python Functions, there's another test already in the file that does it for numexpr functions in a complex coverage. I would say that it's done and verified at this point.