repo tests and some service tests added

...uni/pa165/banking/application/service/AccountService.java

...z/muni/pa165/banking/application/service/UserService.java

...in/java/cz/muni/pa165/banking/domain/account/Account.java

.../banking/domain/account/repository/AccountRepository.java

...muni/pa165/banking/domain/scheduled/ScheduledPayment.java

...main/scheduled/repository/ScheduledPaymentRepository.java

...src/main/java/cz/muni/pa165/banking/domain/user/User.java

.../pa165/banking/domain/user/repository/UserRepository.java

...5/banking/application/controller/AccountControllerIT.java

...a165/banking/application/controller/UserControllerIT.java

...pa165/banking/application/service/AccountServiceTest.java

...ni/pa165/banking/application/service/UserServiceTest.java

...king/domain/account/repository/AccountRepositoryTest.java

.../scheduled/repository/ScheduledPaymentRepositoryTest.java