Merge branch 'dos_new4' into develop

Author: mohanchen

source/module_lr/ri_benchmark/test/ri_benchmark_test.cpp

@@ -63,9 +63,16 @@ TEST(RI_Benchmark, CalCsMO)
 int main(int argc, char** argv)
 {
     srand(time(nullptr));  // for random number generator
+#ifdef __MPI
     MPI_Init(&argc, &argv);
+#endif
+
     testing::InitGoogleTest(&argc, argv);
     int result = RUN_ALL_TESTS();
+
+#ifdef __MPI
     MPI_Finalize();
+#endif
+
     return result;
-}
+}