Changes

tsk62 Fixes in add user
It does not allow to register the same login or a user with the same
email, showing the corresponding error in the view. The title of the
page is displayed correctly. It also corrects the length of the phone,
since with length 9, international format is not allowed, besides the
date. It eliminates unnecessary injections and the service is renamed 
following the managed bean convention. Design of the unified view with
the rest of the views.