[IOT-1536] add logic checking the device presence when finding resource.

[IOT-1536] add logic checking the device presence when finding resource.

Change-Id: I6cbfb62855a80d03bf0aebf505505222a146ca38
Signed-off-by: eunok.shin <eunok.shin@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/13817
Reviewed-by: Yeonghun Nam <yeonghun.nam@samsung.com>
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Jee Hyeok Kim <jihyeok13.kim@samsung.com>
(cherry picked from commit 9f5c6903aa2187ca8b7326416f764bed044b1c61)
Reviewed-on: https://gerrit.iotivity.org/gerrit/14543
Reviewed-by: Uze Choi <uzchoi@samsung.com>