mgmt: NfdManagerBase::makeAuthorization uses CommandAuthenticator

This commit also eliminates Forwarder in Mgmt/TestFaceManager/CreateFace test suite
and uses FaceTable directly.

refs #2063

Change-Id: I596e8c2a12dad64ee75082f384955f30d574f53e
diff --git a/tests/daemon/mgmt/forwarder-status-manager.t.cpp b/tests/daemon/mgmt/forwarder-status-manager.t.cpp
index c267943..3bd8127 100644
--- a/tests/daemon/mgmt/forwarder-status-manager.t.cpp
+++ b/tests/daemon/mgmt/forwarder-status-manager.t.cpp
@@ -40,7 +40,7 @@
     : manager(m_forwarder, m_dispatcher)
     , startTime(time::system_clock::now())
   {
-    setPrivilege("status");
+    setTopPrefix();
   }
 
 protected: