FundamentalUniverseSelectionModel PEP8 Issues

[DerekMelchin]

Expected Behavior

The python version of the FundamentalUniverseSelectionModel respects PEP8 conventions.

Actual Behavior

The class uses camelCase throughout the code.

Potential Solution

Update camelCase to snake_case

Reproducing the Problem

N/A

System Information

N/A

Checklist

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• [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

• [ ] I have provided detailed steps to reproduce the issue