Remove the user redefinition (cause compile error)

user is defined twice :
User user = userRepository.findOne(userDTO.getLogin());
User user = userService.createUserInformation(userDTO.getLogin(), [...]
The redefinition cause compile error on java 1.7
Merge pull request #834 from unknownboy/fix-for-java1.7

Remove the user redefinition (cause compile error)