Add config getter to CacheManager

[HugoHeneault]

:sparkles: What kind of change does this PR introduce? (Bug fix, feature, docs update...)

Feature

:arrow_heading_down: What is the current behavior?

CacheManager.config isn't accessible

:new: What is the new behavior (if this is a feature change)?

I added a CacheManager.config getter allowing to read config.

:boom: Does this PR introduce a breaking change?

No

:bug: Recommendations for testing

This is quite simple, shouldn't require much testing.

:memo: Links to relevant issues/docs

:thinking: Checklist before submitting

• [X] All projects build
• [X] Follows style guide lines (code style guide)
• [X] Relevant documentation was updated
• [X] Rebased onto current develop