security: Fix to access dereferenced object memory in OCSecure class

security: Fix to access dereferenced object memory in OCSecure class

[Joonghwan Lee]

This patch fix below invalid memory access in OCSecure class
- invalid DisplayNumContext object access
- invalid UserConfirmNumContext object access
- minor fix : prevent duplicated call of SetResult()

[Philippe Coval]

Ported from 1.2-rel branch to master

  Conflicts:
	resource/csdk/security/provisioning/src/ownershiptransfermanager.c

Change-Id: I623c856f7086cf7fe7333e69f682070434961fbe
Signed-off-by: Joonghwan Lee <jh05.lee@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/16369
Tested-by: jenkins-iotivity <jenkins@iotivity.org>
Reviewed-by: Chul Lee <chuls.lee@samsung.com>
Reviewed-by: Randeep Singh <randeep.s@samsung.com>
Author: Joonghwan Lee <jh05.lee@samsung.com>
Signed-off-by: Philippe Coval <philippe.coval@osg.samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/16949