Change DEVICE payload in correct format.

Change DEVICE payload in correct format.

Removes enclosing array, href and rep from the device payload.

It changes structure from
[{
  href: "",
  rep: {
   device payload
  }
}]
to
{
  device payload

}

Change-Id: I374d3c1e6dca24a0ae97f56ac0c5e40d3cbf09e0
Signed-off-by: Habib Virji <habib.virji@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/4435
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>