notification: Enable SECURED build of unit tests.

notification: Enable SECURED build of unit tests.

The notification consumer and provider tests didn't include
the "SECURED" macros for builds with security turned on, even
though it seems clear from the code, that it expected that macro
to be present in some cases.

Bug: https://jira.iotivity.org/browse/IOT-1583
Change-Id: I1166a60c2ad821a7d6002e22a8c9e8bda7321800
Signed-off-by: Pawel Winogrodzki <pawelwi@microsoft.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/21329
Tested-by: jenkins-iotivity <jenkins@iotivity.org>
Reviewed-by: Dan Mihai <Daniel.Mihai@microsoft.com>
Reviewed-by: Phil Coval <philippe.coval@osg.samsung.com>