Functional tests can't be executed against a real cluster because an in-memore DB can't be shared between processes

In an attempt to use sqoop functional tests against a real cluster I have hit a problem where an in-memory DB is being used by the tests. While it seems highly convenient for non-cluster runs (as a part of dev. build, etc.) it makes cluster testing impossible. There's no easy workaround for this because a database can't be configured by any traditional means.