Migrate to ndn-cxx 0.7.1: Part 1

Change-Id: I621a6230272cfde5d84aa5ca9abdf40a91337491
diff --git a/src/ca-storage/ca-memory.cpp b/src/ca-storage/ca-memory.cpp
index 1fe27e1..e08a822 100644
--- a/src/ca-storage/ca-memory.cpp
+++ b/src/ca-storage/ca-memory.cpp
@@ -20,7 +20,7 @@
 
 #include "ca-memory.hpp"
 
-#include <ndn-cxx/security/v2/validation-policy.hpp>
+#include <ndn-cxx/security/validation-policy.hpp>
 
 namespace ndn {
 namespace ndncert {