GitLab

Implement signalling messages as per COAP over TCP
spec in RFC 8323

Change-Id: I25baf80c4b4380d1f9f9a8f81281f371927f7ed1
Signed-off-by: Sushil Yadav <sushil.ky@samsung.com>
Signed-off-by: Veeraj Khokale <veeraj.sk@samsung.com>
Signed-off-by: Harry <h.marappa@samsung.com>