security+node: Fixing includes and removing deprecated files

Change-Id: If1565b8ae9c1c1dd78a0bc0490c76a836c1ceacf
diff --git a/src/security/identity/osx-private-key-storage.cpp b/src/security/identity/osx-private-key-storage.cpp
index fec7671..adf3542 100644
--- a/src/security/identity/osx-private-key-storage.cpp
+++ b/src/security/identity/osx-private-key-storage.cpp
@@ -13,8 +13,9 @@
 #include <sstream>
 
 #include "../../util/logging.hpp"
-#include "osx-private-key-storage.hpp"
-#include "../certificate/public-key.hpp"
+
+#include <ndn-cpp/security/identity/osx-private-key-storage.hpp>
+#include <ndn-cpp/security/certificate/public-key.hpp>
 
 #include <CoreFoundation/CoreFoundation.h>
 #include <Security/Security.h>