tests: rename integrated -> integration

And move benchmarks to their own subdir

Change-Id: I23460e1135b47d505eacf0571ced1cbf810b7680
diff --git a/tests/unit/main.cpp b/tests/unit/main.cpp
index 51edc79..04c223d 100644
--- a/tests/unit/main.cpp
+++ b/tests/unit/main.cpp
@@ -19,5 +19,5 @@
  * See AUTHORS.md for complete list of ndn-cxx authors and contributors.
  */
 
-#define BOOST_TEST_MODULE ndn-cxx Unit Tests
+#define BOOST_TEST_MODULE ndn-cxx
 #include "tests/boost-test.hpp"