reduce test_period to save time when training openblas

benchmark/paddle/image/run_openblas_train.sh

@@ -15,8 +15,8 @@ function train() {
     --use_mkldnn=False \
     --use_gpu=False \
     --trainer_count=$thread \
-    --log_period=10 \
-    --test_period=100 \
+    --log_period=3 \
+    --test_period=30 \
     --config_args=$args \
     2>&1 | tee ${log}