Use NDN_CXX_UNREACHABLE where appropriate

Change-Id: Idb3d8eade91c9e4d6e09f45a54af170f9c74ff12
diff --git a/tests/daemon/face/lp-reliability.t.cpp b/tests/daemon/face/lp-reliability.t.cpp
index e814042..91bf094 100644
--- a/tests/daemon/face/lp-reliability.t.cpp
+++ b/tests/daemon/face/lp-reliability.t.cpp
@@ -69,25 +69,25 @@
   void
   doSendInterest(const Interest&, const EndpointId&) final
   {
-    BOOST_ASSERT(false);
+    BOOST_FAIL("unexpected doSendInterest");
   }
 
   void
   doSendData(const Data&, const EndpointId&) final
   {
-    BOOST_ASSERT(false);
+    BOOST_FAIL("unexpected doSendData");
   }
 
   void
   doSendNack(const lp::Nack&, const EndpointId&) final
   {
-    BOOST_ASSERT(false);
+    BOOST_FAIL("unexpected doSendNack");
   }
 
   void
   doReceivePacket(const Block&, const EndpointId&) final
   {
-    BOOST_ASSERT(false);
+    BOOST_FAIL("unexpected doReceivePacket");
   }
 };