Cleanup ignat99 feat

New PR from https://github.com/Ignat99/OpenBazaar/pull/1 directly into OpenBazaar:develop.
@Renelvon Isn't this actually a bug in the original from @Ignat99?

I think he actually meant this:

```Python
settings['privkey'] = settings['privkey'] \
    if 'privkey' in settings else ""
```
Does that make sense?  I think it might have been a copy paste from lines 686 and 687 in the original:
https://github.com/OpenBazaar/OpenBazaar/pull/690/files#diff-06caaf3cbf31ee2085d6189a8fe7e166L686