simulator: Disable SECURED mode

simulator: Disable SECURED mode

Simulator will be built only in Unsecured mode on IP transport.

Bug: https://jira.iotivity.org/browse/IOT-2239
Change-Id: I1bf19643c7ffe53ea995ca4b1dfd5a713fbe864a
Signed-off-by: Philippe Coval <philippe.coval@osg.samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/20703
Tested-by: jenkins-iotivity <jenkins@iotivity.org>
Reviewed-by: Senthil Kumar G S <senthil.gs@samsung.com>
Reviewed-by: Larry Sachs <larry.j.sachs@intel.com>
Reviewed-by: Harish Marappa <h.marappa@samsung.com>
(cherry picked from commit d398ef7e4d4c41ce739c18d18012a88c7cbc7c3d)
Reviewed-on: https://gerrit.iotivity.org/gerrit/21091
Reviewed-by: Dan Mihai <Daniel.Mihai@microsoft.com>