all: avoid usage of deprecated namespace ndn::Tlv

refs #2079

Change-Id: I3d8748929706726b55fe1a9a0f6ae00857ea3547
diff --git a/tests/daemon/mgmt/strategy-choice-publisher.cpp b/tests/daemon/mgmt/strategy-choice-publisher.cpp
index fda3e1e..e85bc4a 100644
--- a/tests/daemon/mgmt/strategy-choice-publisher.cpp
+++ b/tests/daemon/mgmt/strategy-choice-publisher.cpp
@@ -79,7 +79,7 @@
 
     // wrap the Strategy Choice entries in a single Content TLV for easy parsing
     m_buffer.prependVarNumber(m_buffer.size());
-    m_buffer.prependVarNumber(ndn::Tlv::Content);
+    m_buffer.prependVarNumber(tlv::Content);
 
     ndn::Block parser(m_buffer.buf(), m_buffer.size());
     parser.parse();