Enrich a sceneclient sample application for executing an existing scene at remote...

Enrich a sceneclient sample application for executing an existing scene at remote device

Add one more scenario in a sceneclient sample, which executes an existing
scene created by sceneserver sample application.

Step1: Construct a SceneCollection with light and fan resources with
sceneserver application
Step2: Discover its SceneList resource
Step3: Check the exsiting SceneCollection resource and Scenes
Step4: Execute one of the Scenes

Change-Id: I58bd8eb5b3913c8a180de509b56605051d54ecc0
Signed-off-by: Jihun Ha <jihun.ha@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/5297
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Uze Choi <uzchoi@samsung.com>