Pass '--return' settings in batch mode.

When invoking:
 
```
salt '*' test.ping --return mongo
```

the returner settings works as expected, however, when invoking:

```
salt -b 10 '*' test.ping --return mongo
```

the returnner settings are ignored, the minion get ``ret=''``.

A issue is opened 3 months ago, seems no one did fixed it yet. (Or maybe I just didn't find another pull request that does.)