Remove duplicated deviceID check in PM_Discovery

Remove duplicated deviceID check in PM_Discovery

Patch 1: upload
Patch 2,3: If self reply, discard it.
Patch 4: Retriger jenkins build

Change-Id: Ife6bf2a802aa17da63899ad904a1df085696340e
Signed-off-by: js126.lee <js126.lee@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/16297
Reviewed-by: Chul Lee <chuls.lee@samsung.com>
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Randeep Singh <randeep.s@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/16885
Tested-by: jenkins-iotivity <jenkins@iotivity.org>
Reviewed-by: Kevin Kane <kkane@microsoft.com>