Change namespace of DummyClientFace, Signal, Segmenter, SegmentFetcher

refs #3940

Change-Id: Ia3c9b4adcca9ff79a14be705ca9da525914f3dff
diff --git a/tests/update/test-nfd-rib-command-processor.cpp b/tests/update/test-nfd-rib-command-processor.cpp
index 9385790..5105f9c 100644
--- a/tests/update/test-nfd-rib-command-processor.cpp
+++ b/tests/update/test-nfd-rib-command-processor.cpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /*
- * Copyright (c) 2014-2022,  The University of Memphis,
+ * Copyright (c) 2014-2023,  The University of Memphis,
  *                           Regents of the University of California,
  *                           Arizona Board of Regents.
  *
@@ -87,7 +87,7 @@
   }
 
 public:
-  ndn::util::DummyClientFace face;
+  ndn::DummyClientFace face;
   ConfParameter conf;
   DummyConfFileProcessor confProcessor;