Remove more use of deprecated code

Change-Id: I4322ab4aedb9287acf2eb608f96b7eefbc5f7dba
Refs: #3988
diff --git a/tests-integrated/test-validator.cpp b/tests-integrated/test-validator.cpp
index 2fd729d..406ef0c 100644
--- a/tests-integrated/test-validator.cpp
+++ b/tests-integrated/test-validator.cpp
@@ -219,7 +219,7 @@
 
 BOOST_FIXTURE_TEST_CASE(CertificateStorage, ValidatorFixture)
 {
-  std::vector<ndn::CertificateSubjectDescription> subjectDescription;
+  std::vector<ndn::security::v1::CertificateSubjectDescription> subjectDescription;
 
   // Create an operator identity
   ndn::Name opIdentity("/TestValidator/operator/NLSR");