GitLab

 - mediator/submediator sample app.
 - enrolleeSecurity class memory issue.

Change-Id: I74652088e48008458f6b76b119cc068895d640b4
Signed-off-by: Parkhi <h_w.park@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/17255Tested-by: jenkins-iotivity <jenkins@iotivity.org>
Reviewed-by: Jihun Ha <jihun.ha@samsung.com>
Reviewed-by: Uze Choi <uzchoi@samsung.com>