[WFLY-3485] Refactor mod_cluster transformers and move transformations to its resources
[WFLY-3485] Move path objects to their own resource classes
Refactor the way we register transformers - enclosing if-s is not necessary
Merge pull request #6433 from rhusar/WFLY-3485_modcluster_transformers

[WFLY-3485] Refactor mod_cluster transformers and move transformations to its resources