A few code reorganizations

Change-Id: If4632fecc7085e5448226c2061e08546757eda9b
diff --git a/tests/core/tree-generation-fixture.t.cpp b/tests/core/tree-generation-fixture.t.cpp
index eaf94e6..c7fa664 100644
--- a/tests/core/tree-generation-fixture.t.cpp
+++ b/tests/core/tree-generation-fixture.t.cpp
@@ -23,7 +23,8 @@
 
 #include "boost-test.hpp"
 
-namespace nsl {
+namespace ndn {
+namespace delorean {
 namespace tests {
 
 BOOST_AUTO_TEST_SUITE(TestTreeGenerator)
@@ -109,4 +110,5 @@
 BOOST_AUTO_TEST_SUITE_END()
 
 } // namespace tests
-} // namespace nsl
+} // namespace delorean
+} // namespace ndn