mgmt: loosened coupling between FibManager and InternalFace

Implemented InternalFace.setInterestFilter to loosen
coupling

refs: #1138

Change-Id: Ie58daed35bc3613398c8d3fc1de8b796e29907b8
diff --git a/daemon/mgmt/manager-base.hpp b/daemon/mgmt/manager-base.hpp
index 97f4c05..7308b3e 100644
--- a/daemon/mgmt/manager-base.hpp
+++ b/daemon/mgmt/manager-base.hpp
@@ -23,7 +23,7 @@
 
 protected:
 
-  virtual void
+  void
   sendResponse(const Name& name,
                  uint32_t code,
                  const std::string& text);