Replaced Class.forName where possible

[nbauma109]

I recommend using Class.forName only when class name comes from an external source (i.e. system property, etc..). When the class name comes from a string constant in the code, it is possible to replace it with a supplier. It will help avoid breaking the code after an offuscation task, for example.

[bobbylight]

This is an API change and is thus slated for 4.0.0.