Bug: Executor - fix bug in result writing to files for mpi mode (#328)

**Description**
fix the bug in result writing to files for mpi mode.

superbench/executor/executor.py

@@ -141,7 +141,7 @@ def __get_rank_id(self):
         Return:
             int: Rank ID.
         """
-        for rank_env in ['PROC_RANK', 'LOCAL_RANK']:
+        for rank_env in ['PROC_RANK', 'LOCAL_RANK', 'OMPI_COMM_WORLD_LOCAL_RANK']:
             if os.getenv(rank_env):
                 return int(os.getenv(rank_env))