Fixes naming and unit errors in CCF and Boavizta models

[jmcook1186]

Types of changes

• Enhancement (project structure, spelling, grammar, formatting)
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.

A description of the changes proposed in the Pull Request

Updates variable names across models from cpu to cpu-util for percentage CPU usage arriving from impl.
Removes multiplication by 100 that was previously implemented for converting fractional CPU usage to percentage. We expect cpu-util to arrive as a percentage.

Fixes #189