nlsr: Don't use ndn aliases provided by ndn-cxx/common.hpp

refs: #3983

Change-Id: I31da8d68e0285dcfe9c7d3e5e678c00397d22bef
diff --git a/tests/publisher/test-segment-publisher.cpp b/tests/publisher/test-segment-publisher.cpp
index 2849457..c6b4fba 100644
--- a/tests/publisher/test-segment-publisher.cpp
+++ b/tests/publisher/test-segment-publisher.cpp
@@ -134,7 +134,7 @@
   }
 
 protected:
-  ndn::shared_ptr<ndn::util::DummyClientFace> m_face;
+  std::shared_ptr<ndn::util::DummyClientFace> m_face;
   const ndn::time::milliseconds m_expectedFreshnessPeriod;
   TestSegmentPublisher<N> m_publisher;
   ndn::EncodingBuffer m_buffer;