SuccessChanges

Summary

  1. Adds the missing tests for the User and Registration entities (details)
Commit b5138923b7863318f3abc5058d00c3801effb4c1 by Miguel Reboiro-Jato
Adds the missing tests for the User and Registration entities
This commit adds the unit tests for the User and Registration entities. 
This tests revealed a minor bug in the Registration.getUser() method, 
that has been solved.
The file was addeddomain/src/test/java/es/uvigo/esei/dgss/letta/domain/RegistrationTest.java
The file was modifieddomain/src/main/java/es/uvigo/esei/dgss/letta/domain/Registration.java
The file was addeddomain/src/test/java/es/uvigo/esei/dgss/letta/domain/UserParameters.java
The file was addeddomain/src/test/java/es/uvigo/esei/dgss/letta/domain/UserTest.java