Finished coding and testing SQLiteReservationsDAO

AH, I must have missed this on my first pass. You could just initialize these with their declaration and then you could refer to the same ones throughout your tests. So an example test would look like:

```
@Test
public void savesFlightCorrectly() {
    try {
        testDao.addFlight(flight);
        assert(testDao.getFlightById(flight.getId)).equals(flight);
    }
    catch (SQLException e) {
        fail();
    }
}
```