Return full image paths in ImageNet item ids

[sizov-kirill]

Summary

Resolved #336 by changing id for items.

How to test

Import the original ImageNet dataset with Datumaro.

Checklist

• I submit my changes into the develop branch
• I have added description of my changes into CHANGELOG
• I have updated the documentation accordingly
• I have added tests to cover my changes
• I have linked related issues

License

• I submit my code changes under the same MIT License that covers the project.
  Feel free to contact the maintainers if that's a concern.
• I have updated the license header for each file (see an example below)

# Copyright (C) 2021 Intel Corporation
#
# SPDX-License-Identifier: MIT

[zhiltsov-max]

Could you please check is the original dataset contains the same images in different directories? You can use operations.find_unique_images().

Maybe, we should append the label directory in front of the item id as well as in other formats?

[sizov-kirill]

Could you please check is the original dataset contains the same images in different directories? You can use operations.find_unique_images().

Maybe, we should append the label directory in front of the item id as well as in other formats?

@zhiltsov-max I checked, the original dataset has the same images in different directories but all of them have different names.

I don't think that is a need to add the label directory in front of the item id, because images in the directories have name label_xxxx.jpg (in the original dataset).

[zhiltsov-max]

Please fix the remaining test

[zhiltsov-max]

Update the changelog