build: Warnings correction for gcc 4.2

Also in this commit some code style corrections.

Change-Id: Idf2b5b96b328fb3dbea7440362c84d7759a10ec5
Refs: #1429
diff --git a/tests/security/test-certificate-cache.cpp b/tests/security/test-certificate-cache.cpp
index ee7fd6f..d259e28 100644
--- a/tests/security/test-certificate-cache.cpp
+++ b/tests/security/test-certificate-cache.cpp
@@ -4,11 +4,11 @@
  * See COPYING for copyright and distribution information.
  */
 
-#include <boost/test/unit_test.hpp>
-#include <unistd.h>
 #include "security/certificate-cache-ttl.hpp"
 #include "face.hpp"
 
+#include "boost-test.hpp"
+
 using namespace std;
 
 namespace ndn {
@@ -39,7 +39,7 @@
 
   Name name1 = certName1.getPrefix(-1);
   Name name2 = certName2.getPrefix(-1);
-  
+
   cache->insertCertificate(cert1);
   cache->insertCertificate(cert2);