Integrate name change (add /ndn/multicast/ prefix). Additionally updated unit tests to test cases of
many torrent segments and many manifests.

Change-Id: Ieb3b3971fb09e31ddb15d85b5907ee7be41ef1ba
diff --git a/src/file-manifest.hpp b/src/file-manifest.hpp
index 8366db2..e11b560 100644
--- a/src/file-manifest.hpp
+++ b/src/file-manifest.hpp
@@ -312,7 +312,7 @@
 inline std::string
 FileManifest::file_name() const
 {
-  return name().getSubName(1, name().size() - 2).toUri();
+  return name().getSubName(3, name().size() - 4).toUri();
 }