tests: move makeInterest/makeData/etc to ndn::tests namespace

refs #2376

Change-Id: If824388f1e2859d7d2199cd622db2aa1a3277798
diff --git a/tests/unit-tests/util/in-memory-storage-persistent.t.cpp b/tests/unit-tests/util/in-memory-storage-persistent.t.cpp
index 1734774..af33ab3 100644
--- a/tests/unit-tests/util/in-memory-storage-persistent.t.cpp
+++ b/tests/unit-tests/util/in-memory-storage-persistent.t.cpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /**
- * Copyright (c) 2013-2015 Regents of the University of California.
+ * Copyright (c) 2013-2016 Regents of the University of California.
  *
  * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
  *
@@ -29,7 +29,10 @@
 namespace util {
 namespace tests {
 
-BOOST_AUTO_TEST_SUITE(UtilInMemoryStorage)
+using namespace ndn::tests;
+
+BOOST_AUTO_TEST_SUITE(Util)
+BOOST_AUTO_TEST_SUITE(TestInMemoryStorage)
 BOOST_AUTO_TEST_SUITE(Persistent)
 
 BOOST_AUTO_TEST_CASE(GetLimit)
@@ -59,7 +62,8 @@
 }
 
 BOOST_AUTO_TEST_SUITE_END() // Persistent
-BOOST_AUTO_TEST_SUITE_END() // UtilInMemoryStorage
+BOOST_AUTO_TEST_SUITE_END() // TestInMemoryStorage
+BOOST_AUTO_TEST_SUITE_END() // Util
 
 } // namespace tests
 } // namespace util