_md5Pd = new Base64MD5PasswordFilePrincipalDatabase();
_md5PwdFile = createTempPasswordFile(this.getClass().getName()+"md5pwd", USERNAME, B64_MD5HASHED_PASSWORD);
_md5Pd.setPasswordFile(_md5PwdFile.getAbsolutePath());
_plainPd = new PlainPasswordFilePrincipalDatabase();
_plainPwdFile = createTempPasswordFile(this.getClass().getName()+"plainpwd", USERNAME, PASSWORD);
_plainPd.setPasswordFile(_plainPwdFile.getAbsolutePath());
testSubject = new Subject(true,
Collections.singleton(new JMXPrincipal(USERNAME)),