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

Change-Id: I255c27b552b32570871a9d5f8bda814ba8723c80
Refs: #2497
diff --git a/tests/unit-tests/interest.t.cpp b/tests/unit-tests/interest.t.cpp
index 7a8fbbe..240cc80 100644
--- a/tests/unit-tests/interest.t.cpp
+++ b/tests/unit-tests/interest.t.cpp
@@ -1117,7 +1117,7 @@
   BOOST_CHECK_EQUAL(InterestFilter("/a", "<b><>+").doesMatch("/a/b/c"), true);
 }
 
-BOOST_AUTO_TEST_SUITE_END()
+BOOST_AUTO_TEST_SUITE_END() // TestInterest
 
 } // namespace tests
 } // namespace ndn