User life cycle: user-del supports --permanently, --preserve options and ability to delete deleted user
    
    change user plugin commands : user-del
    	- --permanently: deletes permanently an Active user (DEL)
    	- --preserve: move an Active user to Delete user (MODRDN)
    	- allows to delete Active user and Delete user
    
    https://fedorahosted.org/freeipa/ticket/3813
    
    Reviewed-By: David Kupka <dkupka@redhat.com>