Change #include style

Header files are now always included with their path from the
project's root directory rather than the path relative to
the includer.

Change-Id: If39b8510eef8da00baf5fe88337c45dbdf8c766e
Refs: #3084
diff --git a/tests/integrated/timed-execute.hpp b/tests/integrated/timed-execute.hpp
index 7f71e72..83767a1 100644
--- a/tests/integrated/timed-execute.hpp
+++ b/tests/integrated/timed-execute.hpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /*
- * Copyright (c) 2013-2017 Regents of the University of California.
+ * Copyright (c) 2013-2018 Regents of the University of California.
  *
  * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
  *
@@ -22,7 +22,7 @@
 #ifndef NDN_TESTS_INTEGRATED_TIMED_EXECUTE_HPP
 #define NDN_TESTS_INTEGRATED_TIMED_EXECUTE_HPP
 
-#include "util/time.hpp"
+#include "ndn-cxx/util/time.hpp"
 
 namespace ndn {
 namespace tests {