Fixed update account process to unregister only account objects.

        Update the database with accounts.

        '''

        db_accounts = self.objects.get_ids()

        all_objects = self.objects.all((), ())

        db_accounts = set([o['a'] for o in all_objects if 'a' in o])

        accounts = set(self.conf.list_accounts())

        to_register = accounts - db_accounts