Added cells customizer

unit_tests/partition/cell_storage.cpp

@@ -16,6 +16,8 @@
 using namespace osrm;
 using namespace osrm::partition;
 
+namespace
+{
 struct MockEdge
 {
     NodeID start;
@@ -41,6 +43,7 @@ auto makeGraph(const std::vector<MockEdge> &mock_edges)
     std::sort(edges.begin(), edges.end());
     return util::StaticGraph<EdgeData>(max_id + 1, edges);
 }
+}
 
 BOOST_AUTO_TEST_SUITE(cell_storage_tests)