Add UT

tests/ut/ge/graph/load/davinci_model_unittest.cc

@@ -99,7 +99,7 @@ TEST_F(UtestDavinciModel, init_netoutput_op_subgraph) {
   op_output->SetInputOffset({1024});
   op_output->SetSrcName( { "data" } );
   op_output->SetSrcIndex( { 0 } );
-  NodePtr output = graph->AddNode(op_output);
+  NodePtr node = graph->AddNode(op_output);
 
   std::vector<OpDescPtr> output_op_list;
   EXPECT_EQ(model.InitNetOutput(nullptr, node, output_op_list), SUCCESS);