Adjust includes for the updated locations of ndn-cxx security headers

Change-Id: I788d56cee45aae9f7ce5d15320395d3d591f7e61
diff --git a/tests/identity-management-fixture.cpp b/tests/identity-management-fixture.cpp
index e26b30c..a9251b4 100644
--- a/tests/identity-management-fixture.cpp
+++ b/tests/identity-management-fixture.cpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /*
- * Copyright (c) 2013-2019 Regents of the University of California.
+ * Copyright (c) 2013-2020 Regents of the University of California.
  *
  * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
  *
@@ -20,7 +20,7 @@
  */
 
 #include "identity-management-fixture.hpp"
-#include <ndn-cxx/security/v2/additional-description.hpp>
+#include <ndn-cxx/security/additional-description.hpp>
 #include <ndn-cxx/util/io.hpp>
 #include <boost/filesystem.hpp>
 
@@ -128,4 +128,4 @@
 
 } // namespace tests
 } // namespace ndncert
-} // namespace ndn
\ No newline at end of file
+} // namespace ndn