NFD+model+apps+helper+tests: Upgrade NFD and related changes

Based on NFD:commit:2fc649bfc67b93b4191cfbee5bcd70330bfb48f0 (version 0.3.4)

Change-Id: I89f5182600467171797af4f8f83e1edffe14ad95
Refs: #3125
diff --git a/examples/ndn-simple.cpp b/examples/ndn-simple.cpp
index 88c0c55..52e6928 100644
--- a/examples/ndn-simple.cpp
+++ b/examples/ndn-simple.cpp
@@ -73,7 +73,7 @@
   ndnHelper.InstallAll();
 
   // Choosing forwarding strategy
-  ndn::StrategyChoiceHelper::InstallAll("/prefix", "/localhost/nfd/strategy/broadcast");
+  ndn::StrategyChoiceHelper::InstallAll("/prefix", "/localhost/nfd/strategy/multicast");
 
   // Installing applications