Refactored: Extracted class JmdslApplyDefaults from JmdslConfig

[Kabilesh020799]

I have extracted the class JmdslApplyDefaults from JmdslConfig, which had improved the code quality, and maintainability, and all made the class JmdslConfig focus on a single functionality. I kindly request you to merge this if you find this improves your code quality. Thanks

[rabelenda]

Thank you again for submitting another PR!

In this scenario, since logic is only used in that class, is tied to JmdslConfig logic and the class is so small, I would rather keep it where it is. Take into consideration that even though removing code from classes makes them easier to maintain, adding classes makes the general project more complex/harder to maintain (more classes=more structure=more dependencies), so there is a balance to keep an eye on between class complexity and project/dependencies complexity.