@Override
                    protected Optional<MigrationVersion> getMigrationTarget() {
                        // This is the version of the mig under test
                        // This ensures we only run migrations up to the version under test
                        return Optional.ofNullable(targetVersion);
                    }
Get an instance of a datasource for use when asserting database state after the migration has
been run.
stroom-app/src/test/java/stroom/app/db/migration/AbstractCrossModuleMigrationTest.java