Return a list of minions to use for the batch run

def __gather_minions(self):
        '''
        Return a list of minions to use for the batch run
        '''
        args = [self.opts['tgt'],
                'test.ping',
                [],
                self.opts['timeout'],
                ]

        selected_target_option = self.opts.get('selected_target_option', None)
        if selected_target_option is not None:
            args.append(selected_target_option)
        else:
            args.append(self.opts.get('tgt_type', 'glob'))

        self.pub_kwargs['yield_pub_data'] = True
        ping_gen = self.local.cmd_iter(*args,
                                       gather_job_timeout=self.opts['gather_job_timeout'],
                                       **self.pub_kwargs)

        # Broadcast to targets
        fret = set()
        nret = set()
        for ret in ping_gen:
            if ('minions' and 'jid') in ret:
                for minion in ret['minions']:
                    nret.add(minion)
                continue
            else:
                try:
                    m = next(six.iterkeys(ret))
                except StopIteration:
                    if not self.quiet:
                        salt.utils.stringutils.print_cli('No minions matched the target.')
                    break
                if m is not None:
                    fret.add(m)
        return (list(fret), ping_gen, nret.difference(fret))