Updated Topic resource changes for C++ wrapper

Updated Topic resource changes for C++ wrapper

1. Modified the Topic resource and Topic LL changes in Provider and Consumer
2. Updated the APIs for Topic resource in C++ wrapper
3. Updated the sample application for calling Topic APIs

patch 1 : initial commit
patch 2 : updated commit message
patch 3 : updated review comments
patch 4 : updated commit message
patch 5 : removed NSAccessPolicy struct

Change-Id: I737bef2eebb129c5f13034d990398d75dd13b3b7
Signed-off-by: abitha.s <abitha.s@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/10623
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Chihyun Cho <ch79.cho@samsung.com>
Reviewed-by: Uze Choi <uzchoi@samsung.com>