Change namespace of DummyClientFace, Signal, Segmenter, SegmentFetcher

refs #3940

Change-Id: Ia3c9b4adcca9ff79a14be705ca9da525914f3dff
diff --git a/tests/route/test-fib.cpp b/tests/route/test-fib.cpp
index 932b63a..7bbfccb 100644
--- a/tests/route/test-fib.cpp
+++ b/tests/route/test-fib.cpp
@@ -71,8 +71,8 @@
   ndn::Scheduler m_scheduler{m_io};
 
 public:
-  ndn::util::DummyClientFace face{m_io, m_keyChain, [] {
-    ndn::util::DummyClientFace::Options opts;
+  ndn::DummyClientFace face{m_io, m_keyChain, [] {
+    ndn::DummyClientFace::Options opts;
     opts.enableRegistrationReply = true;
     opts.registrationReplyFaceId = 128;
     return opts;