Move ConfigurationPropertySource to SPI

Description

There's no reason to expose this class to users. If we need to give users access to configuration properties, let's use a simpler interface, with fewer utility methods.

Environment

None

Assignee

Yoann Rodière

Reporter

Yoann Rodière

Labels

None

Suitable for new contributors

None

Feedback Requested

None

Components

Fix versions

Priority

Major
Configure