Copy dto implementation into bm-api-impl and let it implement respective interfaces
Fix package definitions for dto impl
Convert dtos from bm-api to dto interfaces
Correct DTO interfaces and DTO implementation classes.
Correct Hotel Convertor implementation class, incorrect names of instantiated classes were present.
Implement Convertor classes, remove Convertor Interfaces - interface can't contain static methods - reimplement Hotel Convertor.
Improv convertor classes - throw illegal argument exception, check for null values.
Correct convertor classes, add test coverage for convertor classes.