fix simple test

Signed-off-by: Santiago Figueroa Manrique <figueroa1395@gmail.com>

Author: figueroa1395

tests/data/state_estimation/basic-current-sensor/input.json

@@ -21,7 +21,7 @@
       {"id": 6, "measured_object": 1, "u_sigma": 200, "u_measured": 10000}
     ],
     "sym_current_sensor": [
-      {"id": 7, "measured_object": 3, "measured_terminal_type": 0, "angle_measurement_type": 0, "i_sigma": 1, "i_angle_sigma": 0.05, "i_measured": 10, "i_angle_measured": 0.3}
+      {"id": 7, "measured_object": 3, "measured_terminal_type": 0, "angle_measurement_type": 1, "i_sigma": 1, "i_angle_sigma": 0.05, "i_measured": 10, "i_angle_measured": 0.3}
     ]
   }
 }