Adding candidateAP information. Following Samsung Specific Property is added :

Adding candidateAP information. Following Samsung Specific Property is added :

Property Name: Candidate AP List Information
Key: "x.com.samsung.candidateaps"
Type: Object Array (Containing ssid, passphrase, channel and bssid).
Access Mode: Read Write
Description: Candidate AP 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/323
(cherry picked from commit 839c794eda36bc5428933fef26613db1acdad040)

Change-Id: Ia2cc7d6f421c1a0e4f500b820fc11c217d67bf2e
Signed-off-by: agrkush <kush.agrawal@samsung.com>
Signed-off-by: Amit KS <amit.s12@samsung.com>