RouteFollowed CRUD operations

[rogargon]

• Complete the domain model including relationships to other entities (remember, just one of the sides of the relationships needs to be implemented following [How to maintain bi-directional relationships with Spring Data REST and JPA.
• Implement BDD tests for the Create operation using relevant scenarios that check ideal situations but also that proper error messages if part of the data is missing or not properly formatted. You can use RegisterUser.feature as inspiration, also similar features from previous years' projects.
• Implement BDD tests for Retrieve
• Implement BDD tests for Update
• Implement BDD tests for Delete