System modes rules branch no available

[estherag]

Following the instructions on the README. When doing: vcs import < mros-hands-on.repos I get the following error:
=== ./utils/system_modes (git) ===
Could not checkout ref 'feature/rules': fatal: invalid reference: feature/rules

Changing to master branch I think is OK as the System Modes master branch has a README with the following:

The Error Handling and Rules feature is still experimental and might be subject to major changes. However, if no rules are specified in the model file, this feature is not used.

I will test it and keep you informed.