core: reimplement logging using ndn-cxx's facility

Change-Id: Ifc7c5d70a61ad405dc1f1adfa522a2c0ad1586ab
Refs: #4580
diff --git a/tests/global-configuration.cpp b/tests/global-configuration.cpp
index 7cb26b5..25d5061 100644
--- a/tests/global-configuration.cpp
+++ b/tests/global-configuration.cpp
@@ -24,7 +24,7 @@
  */
 
 #include "core/config-file.hpp"
-#include "core/logger-factory.hpp"
+#include "core/log-config-section.hpp"
 
 #include "boost-test.hpp"
 
@@ -47,7 +47,7 @@
     const std::string filename = "unit-tests.conf";
     if (boost::filesystem::exists(filename)) {
       ConfigFile config;
-      LoggerFactory::getInstance().setConfigFile(config);
+      log::setConfigFile(config);
       config.parse(filename, false);
     }