Merge all changes of easy setup in master branch to 1.2-rel branch

Merge all changes of easy setup in master branch to 1.2-rel branch

  https://gerrit.iotivity.org/gerrit/#/c/11947/
  https://gerrit.iotivity.org/gerrit/#/c/12003/
  https://gerrit.iotivity.org/gerrit/#/c/12155/
  https://gerrit.iotivity.org/gerrit/#/c/11991/

Change-Id: Id3ac0160c5edd6c7abecb9714425601747d1a384
Signed-off-by: Parkhi <h_w.park@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/12607
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Uze Choi <uzchoi@samsung.com>