Robert Munteanu, due to the embedding added in org.apache.sling.testing.sling-mock-oak with
SLING-4824, it is not sufficient to update the version of jackrabbit and oak in sling-jcr-repoinit in order to complete SLING-8602. at least i didn't manage to get my test passed and debugging revealed that at some point it resolves to the wrong version of oak i.e. the embedded one.
so, unfortunately, it seems that i need an new release of org.apache.sling.testing.sling-mock-oak. for testing purpose i am helping myself with a snapshot dependencies but obviously that's not a option for the final version.