Pstat payload conversion from JSON to CBOR

Pstat payload conversion from JSON to CBOR

Converts Pstat payload conversion from JSON to CBOR directly using tinycbor library.

- Pstat unit test is updated to match new changes.
- Fixes bug in psinterface to move to the next element.
- ocpayloadparse.c, is updated to include bytestring or cjson depending on the message contents.
- Pstat format: {"isop": <0/1>, "deviceid":<bytestring>, "ch": <int>, "cm": <int>, "om": <int>, "tm": <int>, sm:[<int>, <int>] }.
- Persistant storage format: { "acl": <aclcbor>, "pstat": <pstatcbor> }

Change-Id: I29a92bbf0f24d82612b8795b86119863c4a1905b
Signed-off-by: Habib Virji <habib.virji@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/5045
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-on: https://gerrit.iotivity.org/gerrit/5775