Feat: Handle hover on second parameter for Python functions accessing the datastore

[idillon-sfl]

This ensure the description of the second parameter will be showed on the second parameter of d.renameVar("test", "DESCRIPTION"). It also ensure it will not be showed on the second parameter of d.getVar("DESCRIPTION", "DESCRIPTION"), as it is currently the case on the staging branch.

[deribaucourt]

Comments make the code very easy to read, great!
An idea: Why not also test function names for first parameter functions as well? (getVar, setVar)

[idillon-sfl]

I believe it is already tested in the shows definition on hovering variable in Python functions for accessing datastore section of the tests. For example, shouldNotShow3 tests that d.test('DESCRIPTION') won't show any hover on "DESCRIPTION". Is it what you mean?

However, I have in mind maybe there should be an other way to organize tests that would make it easier to identify want they test.

[deribaucourt]

OK that's perfect