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

Change-Id: I255c27b552b32570871a9d5f8bda814ba8723c80
Refs: #2497
diff --git a/tests/unit-tests/transport/tcp-transport.t.cpp b/tests/unit-tests/transport/tcp-transport.t.cpp
index 3e9a99b..2386553 100644
--- a/tests/unit-tests/transport/tcp-transport.t.cpp
+++ b/tests/unit-tests/transport/tcp-transport.t.cpp
@@ -27,7 +27,10 @@
 namespace ndn {
 namespace tests {
 
-BOOST_FIXTURE_TEST_SUITE(TransportTcpTransport, TransportFixture)
+BOOST_AUTO_TEST_SUITE(Transport)
+BOOST_FIXTURE_TEST_SUITE(TestTcpTransport, TransportFixture)
+
+using ndn::Transport;
 
 BOOST_AUTO_TEST_CASE(GetDefaultSocketNameOk)
 {
@@ -81,7 +84,8 @@
                         });
 }
 
-BOOST_AUTO_TEST_SUITE_END()
+BOOST_AUTO_TEST_SUITE_END() // TestTcpTransport
+BOOST_AUTO_TEST_SUITE_END() // Transport
 
 } // namespace tests
 } // namespace ndn