!4193 modify epoch for lenet-alexnet

Merge pull request !4193 from wukesong/modify_epoch

model_zoo/official/cv/alexnet/src/config.py

@@ -22,7 +22,7 @@ alexnet_cfg = edict({
     'num_classes': 10,
     'learning_rate': 0.002,
     'momentum': 0.9,
-    'epoch_size': 1,
+    'epoch_size': 30,
     'batch_size': 32,
     'buffer_size': 1000,
     'image_height': 227,

model_zoo/official/cv/lenet/src/config.py

@@ -22,7 +22,7 @@ mnist_cfg = edict({
     'num_classes': 10,
     'lr': 0.01,
     'momentum': 0.9,
-    'epoch_size': 1,
+    'epoch_size': 10,
     'batch_size': 32,
     'buffer_size': 1000,
     'image_height': 32,