all: cleanup common.hpp and import typenames from ndn namespace.

This allows us to compile NFD in C++11 mode, making use of std::shared_ptr,
std::function, std::bind, etc. rather than their boost equivalents
(provided that ndn-cpp-dev is also compiled in C++11 mode). This is an
experimental feature and may not work properly.

Change-Id: I310529f78e1e428a8530b087983130d1ef3a9d88
diff --git a/tests/core/logger.cpp b/tests/core/logger.cpp
index 1ccbc31..5a85d45 100644
--- a/tests/core/logger.cpp
+++ b/tests/core/logger.cpp
@@ -24,14 +24,11 @@
 
 #include "core/logger.hpp"
 
-#include <boost/test/unit_test.hpp>
+#include "tests/test-common.hpp"
+
 #include <boost/algorithm/string.hpp>
 #include <boost/algorithm/string/classification.hpp>
 
-#include <iostream>
-
-#include "tests/test-common.hpp"
-
 namespace nfd {
 namespace tests {