Add config base class with config key formatting

[spaceo]

Description

We need to be able to hand over config to dpl react apps with camel cased keys. This class should make it easier.

Checklist

• My complies with our coding guidelines.
• My code passes our static analysis suite. If not then I have added a comment explaining why this change should be exempt from the code standards and process.
• My code passes our continuous integration process. If not then I have added a comment explaining why this change should be exempt from the code standards and process.