【benchmark】update benchmark FOMM epoch (#603)

* fix benchmark

* fix benchmark

* update benchmark FOMM epoch

test_tipc/configs/FOMM/train_infer_python.txt

@@ -52,6 +52,6 @@ null:null
 ===========================train_benchmark_params==========================
 batch_size:16
 fp_items:fp32
-epoch:1
+epoch:5
 --profiler_options:batch_range=[10,20];state=GPU;tracer_option=Default;profile_path=model.profile
-flags:null
+flags:null
\ No newline at end of file