Fix issues reported by SVACE tool in CKM module 2

Fix issues reported by SVACE tool in CKM module 2

Change-Id: Ied98d297287e3e1dad6bc51b19889c6647e097b9
Signed-off-by: i.pazderskyy <i.pazderskyy@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/5627
Reviewed-by: Dmitriy Zhuravlev <d.zhuravlev@samsung.com>
Reviewed-by: Randeep Singh <randeep.s@samsung.com>
Tested-by: Randeep Singh <randeep.s@samsung.com>
(cherry picked from commit f4a9bcabc5e28cbc63ff1dfb4fb727afc3949703)
Reviewed-on: https://gerrit.iotivity.org/gerrit/5639