Review Examples with `joblib`

[AlexCatarino]

Expected Behavior

All examples are executed successfully.

Actual Behavior

Backtests with joblib (e.g.: Scikit Learn) failed when we load a model using joblib.

Potential Solution

Find an alternative to joblib or there is a bug in the available version.

Checklist

• [x] I have completely filled out this template
• [x] I have confirmed that this issue exists on the current master branch
• [x] I have confirmed that this is not a duplicate issue by searching issues

[AlexCatarino]

Lean Foundation Update has fixed the issue with joblib.