Add a dummy ParkingLotCallback

Don't know why the unit test passed last night, won't pass without this
now...

src/com/uncc/gameday/registration/ParkingLotCallback.java

@@ -0,0 +1,20 @@
+package com.uncc.gameday.registration;
+
+import android.util.Log;
+import retrofit.Callback;
+import retrofit.RetrofitError;
+import retrofit.client.Response;
+
+public class ParkingLotCallback implements Callback<ParkingLot> {
+
+	@Override
+	public void failure(RetrofitError e) {
+		Log.w("ParkingLotCallback", e.getMessage());
+	}
+
+	@Override
+	public void success(ParkingLot p, Response r) {
+		return;
+	}
+
+}

src/com/uncc/gameday/registration/RegistrationClient.java

@@ -35,11 +35,11 @@ public class RegistrationClient {
 		ParkingRating pRating = new ParkingRating();
 		pRating.setParkingLot(parkingLot);
 		pRating.setRating(rating);
-		gds.rateLot(pRating, null);
+		gds.rateLot(pRating, new ParkingLotCallback());
 	}
 	
 	public void rateLot(ParkingRating rating) {
-		gds.rateLot(rating, null);
+		gds.rateLot(rating, new ParkingLotCallback());
 	}
 
 }