note that this patch is workaround.
the security policy about vconf value is not determined yet.
for now, we should fix it to launch applications.
(applications don't have permission to read 'User')
Change-Id: I86f9cf043c97f48ac67512beab4caa2c40bb0b77 Signed-off-by: Sangyoon Jang <s89.jang@samsung.com>