Added Samsung Specific Property(sso list) for easy setup

Added Samsung Specific Property(sso list) for easy setup

Following Samsung Specific Property is added :
Resource: Device Configuration (rt = "oic.r.devconf")
Property Name: SSO List Information
Key: "x.com.samsung.ssolist"
Type: String (JSON value with array of string internally).
Access Mode: Read Only
Description: SSO List information

Changes made at Mediator and Enrollee Side (Samsung specific source).

Linux Sample apps updated and verified (Samsung Specific Sample Apps).

https://github.sec.samsung.net/RS7-IOTIVITY/IoTivity/pull/284
(cherry picked from commit 26aec98b390c57957416dff8c3e9a920299aad8a)

Change-Id: Ib5143bb96488820b01404c2ec68dcf04c9f6a02c
Signed-off-by: Kush <kush.agrawal@samsung.com>
Signed-off-by: Amit KS <amit.s12@samsung.com>