I guess if you want to forward the ssh agent you will want that to happen for all ssh operations, not just when calling chef-solo.
Therefore, we need to set it globally in [runner.py](https://github.com/adamdunkley/littlechef/blob/master/littlechef/runner.py#L35).

The other missing piece is in adding the actual command line option to [fix](https://github.com/adamdunkley/littlechef/blob/master/fix#L110)