Generate controllers for all endpoints in tests, so they can be used by client tests; expand model used for query strings

Author: bkoelman

test/OpenApiClientTests/LegacyClient/swagger.g.json

@@ -13,6 +13,7 @@ public LegacyOpenApiIntegrationTests()
         UseController<AirplanesController>();
         UseController<FlightsController>();
         UseController<FlightAttendantsController>();
+        UseController<PassengersController>();
 
         SwaggerDocumentOutputDirectory = "test/OpenApiClientTests/LegacyClient";
     }