Circular reference in userService

[fbalicchia]

Hi,
tatamiUserDetailsService introduction in MailService has created a circular reference.
The problem can be produced using unit test in service module.
Here a part of exception

Caused by: org.springframework.beans.factory.BeanCurrentlyInCreationException: Error creating bean with name 'mailService': Bean with name 'mailService' has been injected into other beans [userService] in its raw version as part of a circular reference, but has eventually been wrapped. This means that said other beans do not use the final version of the bean. This is often the result of over-eager type matching - consider using 'getBeanNamesOfType' with the 'allowEagerInit' flag turned off, for example.