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/tests/unit-tests/helper/ndn-link-control-helper.t.cpp b/tests/unit-tests/helper/ndn-link-control-helper.t.cpp
index a36715a..92ceefb 100644
--- a/tests/unit-tests/helper/ndn-link-control-helper.t.cpp
+++ b/tests/unit-tests/helper/ndn-link-control-helper.t.cpp
@@ -108,7 +108,7 @@
     });
 
   // Choosing forwarding strategy
-  ndn::StrategyChoiceHelper::InstallAll("/prefix", "/localhost/nfd/strategy/broadcast");
+  ndn::StrategyChoiceHelper::InstallAll("/prefix", "/localhost/nfd/strategy/multicast");
 
   addApps({
       {"0", "ns3::ndn::ConsumerCbr",