make it simpler and more stable.
main simplification can come from not starting from the download distro's nor working with maven to fetch old versions but execute the script files directly.
the idea to explore is check if we can create the old db using the scripts that are in the current resources anyway.
we could add testdata insert scripts for each version that inserts the data for a couple of process instances. a tool should be created to capture that data into sql scripts inserting the data. those scripts should be added to the test resources.
it will be a one time effort to capture the data in the old versions. from then forward we only need to run that tool at every release to create the test scripts that insert the process data.