@AfterEach
    void teardown() {
        // DB is not shared with other tests so bin it
        ((UniqueTestDataSourceFactory) dataSourceFactory).drop();

        // Remove the test data migration script
        NullSafe.consume(testDataDir, FileUtil::deleteDir);
    }
@return A string containing the SQL script to run prior to the migration under test.
This can contain multiple statements, stored procedures, SET calls, etc. Same as a SQL
migration script. It does not use bind variables.
stroom-test-common/src/main/java/stroom/test/common/util/db/AbstractSingleFlywayMigrationTest.java