Update tip generation test fixture for new income inputs

Author: MaxGhenis

tests/integration/test_cps_generation.py

@@ -48,6 +48,9 @@ def calculate_dataframe(self, columns, year):
                     "person_id": [1, 2],
                     "household_id": [10, 20],
                     "employment_income": [25_000, 30_000],
+                    "interest_income": [0.0, 0.0],
+                    "dividend_income": [0.0, 0.0],
+                    "rental_income": [0.0, 0.0],
                     "age": [30, 45],
                     "household_weight": [1.0, 1.0],
                     "is_female": [False, True],