Update a logic to utilize newly developed security APIs.

Update a logic to utilize newly developed security APIs.

A patch for security APIs is submitted: https://gerrit.iotivity.org/gerrit/#/c/15577/
With this patch, some points in easy setup can utilize the new APIs for more
correct decision.

Change-Id: I3b570f7f28d587ef39a0323f6d39294c0a391568
Signed-off-by: Jihun Ha <jihun.ha@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/15581
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Uze Choi <uzchoi@samsung.com>
(cherry picked from commit bb947106af8e4b51603cc82c40f96b7c43283dd6)
Reviewed-on: https://gerrit.iotivity.org/gerrit/16013