[BUGFIX] fix the problem that the method `getParent()` find parent's parent.
[BUGFIX] fix the problem that the method `getParent()` find parent's parent.

gotchazipc/webida-server,kyungmi/webida-server,gotchazipc/webida-server,webida/webida-server,webida/webida-server,gotchazipc/webida-server,kyungmi/webida-server,gotchazipc/webida-server,kyungmi/webida-server,webida/webida-server,webida/webida-server,kyungmi/webida-server