Fix fs api test bug.
Fix fs api test bug.

FS is created for fs api test, delete it after test finished.

Change-Id: Ibc359f69c6947bc163f673dd6d40a22e27d9cc03
Signed-off-by: Sangjin Kim <bfebc44951c841ed68cdbb2ef08a301dd474a40a@samsung.com>

gotchazipc/webida-server,kyungmi/webida-server,sangjin3/webida-server,gotchazipc/webida-server,lisyoen/webida-server,sangjin3/webida-server,gotchazipc/webida-server,sangjin3/webida-server,webida/webida-server,lisyoen/webida-server,kyungmi/webida-server,webida/webida-server,kyungmi/webida-server,sangjin3/webida-server,lisyoen/webida-server,kyungmi/webida-server,lisyoen/webida-server,webida/webida-server,gotchazipc/webida-server,webida/webida-server