fix slim detection eval&infer usage (#3602)

PaddleCV/PaddleDetection/slim/distillation/README.md

@@ -115,7 +115,7 @@ python ../eval.py \
 ```
 python ../infer.py \
     --model_path ${checkpoint_path}/${epoch_id}/eval_model/ \
-    --model_name __model__ \
+    --model_name __model__.infer \
     --params_name __params__ \
     -c ../../configs/yolov3_mobilenet_v1_voc.yml \
     --infer_dir ../../demo

PaddleCV/PaddleDetection/slim/prune/README.md

@@ -196,7 +196,7 @@ python ../eval.py \
 ```
 python ../infer.py \
     --model_path ${checkpoint_path}/${epoch_id}/eval_model/ \
-    --model_name __model__ \
+    --model_name __model__.infer \
     --params_name __params__ \
     -c ../../configs/yolov3_mobilenet_v1_voc.yml \
     --infer_dir ../../demo

PaddleSlim/classification/distillation/README.md

@@ -140,7 +140,7 @@ python eval.py \
 python infer.py \
     --use_gpu True \
     --model_path ${save_path}/eval_model/ \
-    --model_name __model__ \
+    --model_name __model__.infer \
     --params_name __params__
 ```
 

PaddleSlim/classification/pruning/README.md

@@ -129,7 +129,7 @@ python eval.py \
 python infer.py \
     --use_gpu True \
     --model_path ${save_path}/eval_model/ \
-    --model_name __model__ \
+    --model_name __model__.infer \
     --params_name __params__
 ```