• Properly handle single field data classes
• Properly handle multi constructor data classes
• Properly handle all defaults constructor data classes

This resolves different Kotlin related issues:

• Fixes Not using kotlin primary constructor #2577 - Not using Kotlin data primary constructor
• Fixes Kotlin Data class with all nullable fields is not mapped to the target class fields #3031 - Kotlin Data class with all nullable fields is not mapped to the target class fields
• Fixes Kotlin: problems with data classes #2281 - Kotlin: problems with data classes