Troute config tweaks

[quinnylee]

Closes CIROH-UA/ngen-datastream#50
Changes subnetwork_target_size and adapts cpu_cores to the instance configuration

Additions

• Checks os.cpu_count() and sets cpu_cores to os.cpu_count() - 2
• pytest added

Changes

• subnetwork_target_size changed to 1000

Testing

1. pytests ran successfully in Ubuntu/x86
2. Most pytests ran successfully in macOS/arm64 (the new troute cpu count one passed). See test_validation pytests not working as expected on macOS/arm64 #72 for more details on failures

Checklist

• PR has an informative and human-readable title
• Changes are limited to a single goal (no scope creep)
• Code can be automatically merged (no conflicts)
• Code follows project standards (link if applicable)
• Passes all existing automated tests
• Any change in functionality is tested
• New functions are documented (with a description, list of inputs, and expected output)
• Placeholder code is flagged / future todos are captured in comments
• Visually tested in supported browsers and devices (see checklist below 👇)
• Project documentation has been updated (including the "Unreleased" section of the CHANGELOG)
• Reviewers requested with the Reviewers tool ➡️

Testing checklist

Target Environment support

• Linux