security: Allow Identity and Key abstractions to be used in SigningInfo

Change-Id: Ic1c8d6925557ea5da2011ab68f16587eef2102f3
Refs: #3153
diff --git a/tests/unit-tests/security/signing-helpers.t.cpp b/tests/unit-tests/security/signing-helpers.t.cpp
index eeefcbc..0c608e7 100644
--- a/tests/unit-tests/security/signing-helpers.t.cpp
+++ b/tests/unit-tests/security/signing-helpers.t.cpp
@@ -30,6 +30,8 @@
 BOOST_AUTO_TEST_SUITE(Security)
 BOOST_AUTO_TEST_SUITE(TestSigningHelpers)
 
+// update of this test case deferred until the new IdentityManagementFixture is available
+
 BOOST_AUTO_TEST_CASE(Identity)
 {
   Name identity("/identity");