refactor: slim the hotel and country base-data models

tests/BusProNet/DataProvider/HotelDataProviderTest.php

@@ -23,8 +23,8 @@ class HotelDataProviderTest extends TestCase
 
         $this->assertEquals([163959, 11223], array_keys($hotels));
         $this->assertEquals('Sportclub Jenatsch', $hotels[163959]->getName());
-        // MyE&P reports the BusProNet idbuspro as the id, so both properties carry it
-        $this->assertEquals(163959, $hotels[163959]->getId());
+        // MyE&P reports the BusProNet idbuspro as its id, and busProId is the only property
+        // that holds it now - the model used to carry the same number twice
         $this->assertEquals(163959, $hotels[163959]->getBusProId());
         $this->assertEquals('4711', $hotels[163959]->getCostUnit());
         $this->assertEquals('CH', $hotels[163959]->getCountry());