Problem when MessyPhysicalAddress already contains City/Region/Country

If the first parameter of `MessyPhysicalAddress` already contains the City/Region/Country and these parameters are passed again, the string representation of the address will be wrong.

### Example
```php
$address = new MessyPhysicalAddress('Morristown, Nj', new City('Morristown'), new Region('NJ'));
print($address); // "Morristown, Nj, Morristown, Nj". Should be "Morristown, Nj".
```