Updated C++ wrapper for new API Changes

Updated C++ wrapper for new API Changes

1. Modified the Consumer and Provider design and callbacks mechanism for adding subscribtion controlability .
2. Updated the API name changes.
3. Refracted the code
4. Added Provider State and Policy Info for Provider Object.
5. Added copy constructors for Topic and Provider object
6. Added Doxygen comments
7. Updated the Sample application to use Updated APIs

Change-Id: If071b098a9dd836c335d1d621e2e561845b593e6
Signed-off-by: abitha.s <abitha.s@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/11353
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Uze Choi <uzchoi@samsung.com>
Tested-by: Uze Choi <uzchoi@samsung.com>