NFD: Keep both the CS of NFD and ndnSIM

Ref: #2231
diff --git a/model/ndn-l3-protocol.hpp b/model/ndn-l3-protocol.hpp
index 63e4ff2..9ec320f 100644
--- a/model/ndn-l3-protocol.hpp
+++ b/model/ndn-l3-protocol.hpp
@@ -91,7 +91,7 @@
    * \brief Initialize NFD instance
    */
   void
-  initialize();
+  initialize(bool shouldUseNfdCs);
 
   /**
    * \brief Get smart pointer to nfd::Forwarder installed on the node
@@ -158,7 +158,7 @@
 
 private:
   void
-  initializeManagement();
+  initializeManagement(bool isNfd);
 
 private:
   class Impl;