Run key-manager test on onlycap

Run key-manager test on onlycap

Notice: This commit is temporary quick fix for only-cap.
        Test cases should be separated to normal cases and
        smack label of self change needed cases for testing
        unprivileged(without any of capability) client.

- Change smack label to System::Privileged
- Reduce key-manager test app lables
- Add ckm test script for running on onlycap (ckm-tests-on-onlycap.sh).
  Usage is same to ordinary ckm-tests because it propagates all params
  and forwards them to ckm-tests

Change-Id: I3babb11d010eff13c35042107af215b3932f4f2e
Signed-off-by: Kyungwook Tak <k.tak@samsung.com>