product images with same name overwrite previous image fix

[umarch06]

Description

Images were not being renamed while uploading bulk products with images. For example, while importing images from paths a/b.jpg, b/b.jpg, c/b.jpg for three different products were overwriting the same file b.jpg in magento 2. I allowed to rename file if was already existed in Magento 2 catalog product folder. So there is no overwriting while uploading same image name with different folders.

Manual testing scenarios

1. Create A CSV File for import by same name image within multi directory
2. Upload file in pub/media/import directory with directory
3. Login Backend
4. Got to setting >> import
5. Select "Entity Type" Product
6. Select "Import Behavior" Add/Update
7. Upload CSV File
8. Click Button "Check Data "
9. Click "Import"
10. Import will be successful and it will not override the existing images file with same names.

Contribution checklist

• [ ] Pull request has a meaningful description of its purpose
• [ ] All commits are accompanied by meaningful commit messages
• [ ] All new or changed code is covered with unit/integration tests (if applicable)
• [ ] All automated tests passed successfully (all builds on Travis CI are green)

[dmanners]

Please also take a look at the integration tests for this section of the system.

[umarch06]

@dmanners, probably I missed seeing the if check, that is fixed in new commit.

[magento-engcom-team]

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