Change namespace of DummyClientFace, Signal, Segmenter, SegmentFetcher

refs #3940

Change-Id: Ia3c9b4adcca9ff79a14be705ca9da525914f3dff
diff --git a/tests/test-lsa-rule.cpp b/tests/test-lsa-rule.cpp
index cf9c699..eaebf12 100644
--- a/tests/test-lsa-rule.cpp
+++ b/tests/test-lsa-rule.cpp
@@ -85,7 +85,7 @@
    }
 
 public:
-  ndn::util::DummyClientFace face;
+  ndn::DummyClientFace face;
 
   ndn::Name rootIdName, siteIdentityName, opIdentityName, routerIdName;
   ndn::security::pib::Identity rootId, siteIdentity, opIdentity, routerId;