Generate C code without changing message/signal name case

[timrulebosch]

We are looking over PR #513 and #255 and would like to propose a different solution. The idea would be to replace the variable snake_name with code_name (or c_name) in the code base, and then modify the object initialization to set that variable appropriately. That would result in a much more concise operation.

Something along these lines:

 def __init__(self, message):
    ...
    self.code_name = self.name if keepdbcnames else camel_to_snake_case(self.name)
    ...

Would anyone have some feedback, before we go to the trouble of developing the PR. Thanks!

[timrulebosch]

We developed a commit for this that we are using. Based on the experience, I would suggest two changes:

• rename self.snake_name to self.code_name
• refactor/rename camel_to_snake_case() to gen_code_name() with additional changes to trigger the desired behaviour - triggered from a global flag (set via cli option).

Aside from the renaming, which is only a suggestion, that results in a compact change.