Change to calling BaseDataTest#runScript on setup test data

[kazuki43zoo]

Before (e.x):

SqlSession session = sqlSessionFactory.openSession();
Connection conn = session.getConnection();
reader = Resources.getResourceAsReader("org/apache/ibatis/submitted/ancestor_ref/CreateDB.sql");
ScriptRunner runner = new ScriptRunner(conn);
runner.setLogWriter(null);
runner.runScript(reader);
conn.close();
reader.close();
session.close();

After:

BaseDataTest.runScript(sqlSessionFactory.getConfiguration().getEnvironment().getDataSource(),
       "org/apache/ibatis/submitted/ancestor_ref/CreateDB.sql");

The BaseDataTest#runScript is more simply and safely.