filterUnchangedFiles() still broken for multi-module projects

[jakub-bochenski]

#9 will work if you actually include you root project in the build.
E.g. if child inherits from parent and you run: mvn -pl :child -am the paths match.

If you run just mvn -pl :child however, then child will be the sessions top-level project and the paths are still broken

[talios]

Is this something where you just need to run mvn -am -pl :child to also include any parent/upstream dependent modules? I find I have to do that for a lot of my builds where I'm only building subsets.