!30 use string::find instead of equal to distinguish training graph

Merge pull request !30 from chenhaozhe/enable-variable-acc-for-training-graph

mindspore/ccsrc/pipeline/pipeline.cc

@@ -1104,7 +1104,7 @@ bool ExecutorPy::AddDFGraph(const py::dict& init_params, const std::string& phas
   }
   std::string init_graph = "init_subgraph." + net_id;
   std::string checkpoint_name = "save." + net_id;
-  if (phase == "train") {
+  if (phase.find("train") != std::string::npos) {
     (void)DfGraphManager::GetInstance().AddGraph(phase, convertor.GetComputeGraph(), {{"ge.exec.variable_acc", "1"}});
   } else {
     (void)DfGraphManager::GetInstance().AddGraph(phase, convertor.GetComputeGraph());