Usda disabled

[nmrodelo]

Add variable and parameters for USDA disabled status

[MaxGhenis]

please add a test with the formula

[MaxGhenis]

also rename usda_disabled.yaml to disabled.yaml

[MaxGhenis]

@nikhilwoodruff note that we moved some fields around and included a float, ssdi alongside the bools. The tests indicate that the previous code still works, i.e. any is capturing ssdi>0.

[nikhilwoodruff]

@nikhilwoodruff note that we moved some fields around and included a float, ssdi alongside the bools. The tests indicate that the previous code still works, i.e. any is capturing ssdi>0.

It'd work here because OpenFisca's test runner automatically parses single-person arrays into bools. But since any isn't vectorised, I think it'd fail with multiple outputs, as any would return True or False, rather than an array.

[MaxGhenis]

Couple final suggestions then we're good to merge