Finalizing PathWeight tracing

Now tracing is moved to CcnxConsumer
diff --git a/helper/ccnx-trace-helper.cc b/helper/ccnx-trace-helper.cc
index 303d1aa..f5df0cb 100644
--- a/helper/ccnx-trace-helper.cc
+++ b/helper/ccnx-trace-helper.cc
@@ -370,7 +370,7 @@
   NS_LOG_FUNCTION (this);
   m_pathWeightsTrace = new ofstream (pathWeights.c_str (), ios::trunc);
 
-  WindowTracer::PrintHeader (*m_pathWeightsTrace);
+  CcnxPathWeightTracer::PrintHeader (*m_pathWeightsTrace);
   *m_pathWeightsTrace << "\n";
 }