Enhance validation process

Summary

The command validate-system doesn't currently include the validation of the self-reported outputs

Steps to reproduce

Well just run validate-system and see by yourself

What is the expected correct behavior?

The validate-system command should validate three things:

• That the container_outputs directory contains at least one system output,
• That each reported system output is different from the baseline's,
• The directory name starts with a dataset name

These three checks should be performed all the time, and only cause a failure if a --strict flag is provided.

Possible fixes

Look at this, it contains the function to compare two system outputs: https://gitlab.kitware.com/alexandreB/indus-config/blob/master/step_actev_validate_nist_execution.sh

Move the baseline system output from container_outputs to bin/...