[Backport] Fixed issue - #19346 Import data 2.2.6 Value for 'product_type' attribute contains incorrect value

[GovindaSharma]

Original Pull Request

#19408

Description (*)

Fixed issue - #19346
Import data 2.2.6 Value for 'product_type' attribute contains incorrect value

Since 'product_attribute' is reserved attribute,so we can restrict this type of attribute to be created by user.

Fixed Issues (if relevant)

Fixed issue - #19346
Import data 2.2.6 Value for 'product_type' attribute contains incorrect value

Manual testing scenarios (*)

1. create an attribute with code product_type http://i.prntscr.com/AwUJuhizQKatBwNwRa1S7Q.png with type: dropdown scope: global sortable, comparable: no
2. add it to a family and create a product.
3. go to import profiles download sample file then reimport sample file

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)

[magento-engcom-team]

Hi @GovindaSharma. Thank you for your contribution
Here is some useful tips how you can test your changes using Magento test environment.
Add the comment under your pull request to deploy test or vanilla Magento instance:

• @magento-engcom-team give me test instance - deploy test instance based on PR changes
• @magento-engcom-team give me 2.2-develop instance - deploy vanilla Magento instance

For more details, please, review the Magento Contributor Assistant documentation

[magento-engcom-team]

Hi @nuzil, thank you for the review.
ENGCOM-3790 has been created to process this Pull Request

[ghost]

Hi @GovindaSharma, thank you for your contribution!
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[magento-engcom-team]

Hi @GovindaSharma. Thank you for your contribution.
We will aim to release these changes as part of 2.2.8.
Please check the release notes for final confirmation.

Please, consider to port this solution to 2.3 release line.
You may use Porting tool to port commits automatically.