ACL payload conversion from JSON to CBOR

ACL payload conversion from JSON to CBOR

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

- It includes  a new interface for psinterface to update persistant storage to write CBOR instead of JSON.
- Includes a new interface to read file from cbor and pass to Init functions.
- Also removes base64 conversion for device id field.
- OCConvert payload is updated to send uint8_t payload instead of JSON payload string.
- ACL Unit test is updated to match new changes.
- New file unittest.h is added to pass functions from testing purpose.
- Data file are updated to handle new format.
- ACL format: [{"sub": <byteString>, "rsrc":[<string>, ..], prms: <uint64_t>, ownrs: [<byteString>,..]}. ..]
- Persistant storage format: { "acl": <aclcbor>, ... }

Change-Id: I125eb3291342c49cc4335ee3a1327a02b88952ba
Signed-off-by: Habib Virji <habib.virji@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/4669
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Randeep Singh <randeep.s@samsung.com>
Reviewed-by: Jon A. Cruz <jonc@osg.samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/5755