Modify confirmable certificate OTM

Modify confirmable certificate OTM

- In case of user denial, send relevant error message
- Reset in case of confirmation failure
- https://gerrit.iotivity.org/gerrit/#/c/16295/4

Patch #1: initial upload
Patch #2-3: Fix build error
Patch #4: resolve merge conflict

Change-Id: Ib53181fda2300056d69bcc6beac9bad872d0aaea
Signed-off-by: Jongmin Choi <jminl.choi@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/16923
Tested-by: jenkins-iotivity <jenkins@iotivity.org>
Reviewed-by: Randeep Singh <randeep.s@samsung.com>