[Python] Python class names should be CamelCase:d by convention

[practicalswift]

No description provided.

[modocache]

Excellent! I'd also love to see a pull request for a similar convention in the reverse case--one that converts some of the camelCase functions in SwiftBuildSupport.py to snake_case.

Thanks for all the Python improvements, @practicalswift! 👍

[practicalswift]

@modocache Thank you! 😊

I can tackle the reverse case you mention, but before doing that I'd like @nadavrot:s approval of the idea so that such a PR stands a chance of being merged :-)

These are the remaining Python naming convention violations:

• function name should be lowercase (57 instances)
• argument name should be lowercase (16 instances)
• variable in function should be lowercase (145 instances)

Which of those are okay to tackle? :-)

[nadavrot]

@practicalswift I don't see a problem with any of these changes.