[FIX] fixing bug in test_cfg for U-Net _base_ script

tuples were required as default input, but int was given

Author: smttsp

configs/_base_/models/deeplabv3_unet_s5-d16.py

@@ -47,4 +47,4 @@
             type='CrossEntropyLoss', use_sigmoid=False, loss_weight=0.4)),
     # model training and testing settings
     train_cfg=dict(),
-    test_cfg=dict(mode='slide', crop_size=256, stride=170))
+    test_cfg=dict(mode='slide', crop_size=(256, 256), stride=(170, 170)))

configs/_base_/models/fcn_unet_s5-d16.py

@@ -48,4 +48,4 @@
             type='CrossEntropyLoss', use_sigmoid=False, loss_weight=0.4)),
     # model training and testing settings
     train_cfg=dict(),
-    test_cfg=dict(mode='slide', crop_size=256, stride=170))
+    test_cfg=dict(mode='slide', crop_size=(256, 256), stride=(170, 170)))

configs/_base_/models/pspnet_unet_s5-d16.py

@@ -47,4 +47,4 @@
             type='CrossEntropyLoss', use_sigmoid=False, loss_weight=0.4)),
     # model training and testing settings
     train_cfg=dict(),
-    test_cfg=dict(mode='slide', crop_size=256, stride=170))
+    test_cfg=dict(mode='slide', crop_size=(256, 256), stride=(170, 170)))