mgmt: merge ManagerBase with NfdManagerBase

Refs: #4528
Change-Id: I2ecb4af68927157a9eafc269399855cff192bb54
diff --git a/daemon/mgmt/face-manager.hpp b/daemon/mgmt/face-manager.hpp
index 778e824..620ab99 100644
--- a/daemon/mgmt/face-manager.hpp
+++ b/daemon/mgmt/face-manager.hpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /*
- * Copyright (c) 2014-2018,  Regents of the University of California,
+ * Copyright (c) 2014-2019,  Regents of the University of California,
  *                           Arizona Board of Regents,
  *                           Colorado State University,
  *                           University Pierre & Marie Curie, Sorbonne University,
@@ -26,21 +26,20 @@
 #ifndef NFD_DAEMON_MGMT_FACE_MANAGER_HPP
 #define NFD_DAEMON_MGMT_FACE_MANAGER_HPP
 
-#include "nfd-manager-base.hpp"
+#include "manager-base.hpp"
 #include "face/face-system.hpp"
 
 namespace nfd {
 
 /**
- * @brief implement the Face Management of NFD Management Protocol.
+ * @brief Implements the Face Management of NFD Management Protocol.
  * @sa https://redmine.named-data.net/projects/nfd/wiki/FaceMgmt
  */
-class FaceManager : public NfdManagerBase
+class FaceManager : public ManagerBase
 {
 public:
   FaceManager(FaceSystem& faceSystem,
-              Dispatcher& dispatcher,
-              CommandAuthenticator& authenticator);
+              Dispatcher& dispatcher, CommandAuthenticator& authenticator);
 
 private: // ControlCommand
   void