Implement task to check "tizen:setting"

Implement task to check "tizen:setting"

[Issue#] N/A
[Problem] Current wrt-installer only checks "tizen:privilege" level,
even manifest received many requirement of sensitive "tizen:setting"
[Cause] N/A
[Solution] Implement task "task_certify_level"
To avoid sensitive manifest setting is used by untrust application,
installer needs to check privilege level of application. This commit
doesn't use global, static and member value intentionally
to reduce attack.
[SCMRequest] N/A

Change-Id: Icb63c2ad3b02a57c90d39f729db159a84576f348