tests: respect naming conventions and improve nesting of some test suites

Change-Id: I255c27b552b32570871a9d5f8bda814ba8723c80
Refs: #2497
diff --git a/tests/unit-tests/util/indented-stream.t.cpp b/tests/unit-tests/util/indented-stream.t.cpp
index 91dff26..bc033ff 100644
--- a/tests/unit-tests/util/indented-stream.t.cpp
+++ b/tests/unit-tests/util/indented-stream.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).
  *
@@ -24,13 +24,14 @@
 #include "boost-test.hpp"
 #include <boost/test/output_test_stream.hpp>
 
-using boost::test_tools::output_test_stream;
-
 namespace ndn {
 namespace util {
 namespace tests {
 
-BOOST_AUTO_TEST_SUITE(UtilIndentedStream)
+using boost::test_tools::output_test_stream;
+
+BOOST_AUTO_TEST_SUITE(Util)
+BOOST_AUTO_TEST_SUITE(TestIndentedStream)
 
 BOOST_AUTO_TEST_CASE(Basic)
 {
@@ -72,7 +73,8 @@
                           ));
 }
 
-BOOST_AUTO_TEST_SUITE_END()
+BOOST_AUTO_TEST_SUITE_END() // TestIndentedStream
+BOOST_AUTO_TEST_SUITE_END() // Util
 
 } // namespace tests
 } // namespace util