Add Manager class of Scene Collection Resource.

Add Manager class of Scene Collection Resource.

SceneCollectionResourceObject class is manager of Scene Collection resource.
It has handler of request from remote side,
and also has hander of response(execute response) from remote resource.

Change-Id: I20bef133a16adf433fd34f21b03a3b961169918a
Signed-off-by: jyong2.kim <jyong2.kim@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/4919
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Uze Choi <uzchoi@samsung.com>