Provisioning Sample README updated

Provisioning Sample README updated

Patch #1: README file updated
Patch #3: CBOR change stated
Patch #4: File permission fixed

Change-Id: I04d7944aa720960777991277df94bdd9ac7018b1
Signed-off-by: Jongmin Choi <jminl.choi@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/7373
Reviewed-by: Jongsung Lee <js126.lee@samsung.com>
Reviewed-by: Yonggoo Kang <ygace.kang@samsung.com>
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Chul Lee <chuls.lee@samsung.com>
Reviewed-by: Randeep Singh <randeep.s@samsung.com>