!1136 Fix wizard template for new mindspore operator API

From: @moran3
Reviewed-by: @ouwenchang,@lixiaohui33
Signed-off-by: @lixiaohui33

mindinsight/wizard/conf/templates/network/alexnet/src/alexnet.py-tpl

@@ -1,4 +1,4 @@
-# Copyright 2020 Huawei Technologies Co., Ltd
+# Copyright 2020-2021 Huawei Technologies Co., Ltd
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -47,7 +47,7 @@ class AlexNet(nn.Cell):
         self.conv4 = conv(384, 384, 3, pad_mode="same")
         self.conv5 = conv(384, 256, 3, pad_mode="same")
         self.relu = nn.ReLU()
-        self.max_pool2d = P.MaxPool(ksize=3, strides=2)
+        self.max_pool2d = nn.MaxPool2d(kernel_size=3, stride=2, pad_mode="valid")
         self.flatten = nn.Flatten()
         self.fc1 = fc_with_initialize(6*6*256, 4096)
         self.fc2 = fc_with_initialize(4096, 4096)