Plot Mean Dice for Testing dataset

[HripsimeS]

Dear MONAI team,

I am trying to plot the mean dice score for testing dataset in order to compare with validation mean dice score in training process.
https://github.com/Project-MONAI/tutorials/blob/master/3d_segmentation/spleen_segmentation_3d.ipynb
Following the same visualization logic of validation data, I tried to do the same for testing dataset.

[HripsimeS]

The task is complete!