update header files in tests

Change-Id: Ibfffb9367349f58eeb193350bad34fdfccd8c553
diff --git a/tests/unit-tests/client-config.t.cpp b/tests/unit-tests/client-config.t.cpp
index 8aabcab..f23f502 100644
--- a/tests/unit-tests/client-config.t.cpp
+++ b/tests/unit-tests/client-config.t.cpp
@@ -19,8 +19,7 @@
  */
 
 #include "client-config.hpp"
-
-#include "boost-test.hpp"
+#include "test-common.hpp"
 
 namespace ndn {
 namespace ndncert {