rename requesterState to RequestContext

Change-Id: I747559b4da11b350b01494c7c54a674c3d3d45f9
diff --git a/tests/unit-tests/bench.t.cpp b/tests/unit-tests/bench.t.cpp
index 5e48bc8..a36f16f 100644
--- a/tests/unit-tests/bench.t.cpp
+++ b/tests/unit-tests/bench.t.cpp
@@ -103,7 +103,7 @@
   CaProfile item;
   item.m_caPrefix = Name("/ndn");
   item.m_cert = std::make_shared<security::Certificate>(cert);
-  requester::RequesterState state(m_keyChain, item, RequestType::NEW);
+  requester::RequestContext state(m_keyChain, item, RequestType::NEW);
   auto newInterest = requester::Requester::genNewInterest(state, Name("/ndn/alice"),
                                                time::system_clock::now(),
                                                time::system_clock::now() + time::days(1));