face: replace EventEmitter usage with Signal

refs #2300

Change-Id: I17d0d65d2c474b17dd9f23f271a6144b0b4fbc07
diff --git a/daemon/face/local-face.hpp b/daemon/face/local-face.hpp
index e1c34c3..c190956 100644
--- a/daemon/face/local-face.hpp
+++ b/daemon/face/local-face.hpp
@@ -156,7 +156,7 @@
               this->isLocalControlHeaderEnabled(LOCAL_CONTROL_FEATURE_NEXT_HOP_FACE_ID));
           }
 
-        this->onReceiveInterest(*i);
+        this->emitSignal(onReceiveInterest, *i);
       }
     else if (payload.type() == tlv::Data)
       {
@@ -174,7 +174,7 @@
         //       false);
         //   }
 
-        this->onReceiveData(*d);
+        this->emitSignal(onReceiveData, *d);
       }
     else
       return false;