The “Okapi integration” mode, aka “compatibility mode”, mgr-applications makes calls to Okapi. This mode was never fully testing and as it turns out was not really needed. To help with code readability, maintainability, and to avoid confusion, this should be removed, simplifying the code.

Scope:

• Remove branching/logic related to OKAPI integration mode

• Update application.yaml, README.md, etc.

• Update tests as needed.

• changes in applications-poc-tools is out of scope. This will be handled in a separate story.