Consolidate IA.properties into IA.json

[JasonWildMe]

Feature description and context

IA.json replaced IA.properties long ago, yet there are still some important and necessary calls being made to check fields in IA.properties. We should consolidate any remaining logic and config out of IA.properties into IA.json.

This will reduce support incidents where we realize calls are still being made to IA.properties, especially for value identificationClassX, which can easily be determined via similar inspection of IA.json.

Feature sign-off requirements

• IA.properties is removed from the codebase
• Calls to IA.getProperty(...) are removed and replaced with checks made on IA.json content