security: using new security interfaces of ndn-cpp, such as SecPolicy

Change-Id: Id22c8e711bee7c3723076eda7a3f96c72ca7707c
diff --git a/src/invitationdialog.h b/src/invitationdialog.h
index 271b207..9326cf6 100644
--- a/src/invitationdialog.h
+++ b/src/invitationdialog.h
@@ -15,7 +15,7 @@
 
 #ifndef Q_MOC_RUN
 #include <ndn-cpp/data.hpp>
-#include <ndn-cpp/security/certificate/identity-certificate.hpp>
+#include <ndn-cpp/security/identity-certificate.hpp>
 #include "chronos-invitation.h"
 #endif