stop-on stop execution of parent manifest

[Guillermo Gonzalez]

If a manifest includes another manifest with a stop-on phase, when the stop condition is matched not only the included manifest stop execution but also the parent manifest.

example:

manifest-main:

secrets
include config=manifest-sub
nagios-check

manifest-sub:

stop-on return-code=99 config=check

check:

#!/bin/bash
exit 99

Baically stop-on behaves like sys.exit() (in python) instead of a return. which makes it's quite difficult to build reusable manifests that use stop-on to skip a phase for a specific case.
Would be possible to add a config to allow stop-on behave like a return?