* if one doesn't exists, create it.
*/
private void initLocalDB() throws Exception {
fLocalTestDir.mkdirs();
File dbDir = File.createTempFile("OZT", null, fLocalTestDir);
Setup defaults = new Setup(null);
defaults.addProperties(System.getProperties(), "ozoneDB.");
Install.createDB(dbDir.getPath() + ".dir", defaults, new PrintWriter(System.out, true));
initDB("ozonedb:local://" + dbDir.getPath() + ".dir");
}