Correctly convert config integration api resources

[therool]

Description

Correctly return config based integration api resources. Currently it does not append "root api resource" (Magento_Backend::admin) which causes the integrations to be reset all the time even when there are no data changes when the Magento\Integration\Setup\Recurring is run (setup:upgrade) because Magento\Authorization\Model\Acl\AclRetriever::getAllowedResourcesByUser returns resource tree including "root api resource" (Magento_Backend::admin) and when they are compared they do not match.

Detailed explanation:

1. https://github.com/magento/magento2/blob/2.2-develop/app/code/Magento/Integration/Model/ConfigBasedIntegrationManager.php#L128 (Get existing integration)
2. https://github.com/magento/magento2/blob/2.2-develop/app/code/Magento/Integration/Model/Plugin/Integration.php#L109 (Append integration api resources)
3. https://github.com/magento/magento2/blob/2.2-develop/app/code/Magento/Integration/Model/Plugin/Integration.php#L123 (Append config based integration api resources)
4. https://github.com/magento/magento2/blob/2.2-develop/app/code/Magento/Integration/Model/ConsolidatedConfig.php#L68 (Read config based integrations)
5. https://github.com/magento/magento2/blob/2.2-develop/app/code/Magento/Integration/Model/Config/Consolidated/Reader.php#L36 (Converter used to convert api resources from `etc/integration.xml)
6. https://github.com/magento/magento2/blob/2.2-develop/app/code/Magento/Integration/Model/Config/Consolidated/Converter.php#L41 (Converts config integrations api resources without "root api resource" (Magento_Backend::admin)
7. https://github.com/magento/magento2/blob/2.2-develop/app/code/Magento/Integration/Model/ConfigBasedIntegrationManager.php#L130 (Returns resource tree including "root api resource" (Magento_Backend::admin)
8. https://github.com/magento/magento2/blob/2.2-develop/app/code/Magento/Integration/Model/ConfigBasedIntegrationManager.php#L171 (Condition is true due one resource tree having "root api resource" (Magento_Backend::admin) and the other not)

Fixed Issues (if relevant)

1. Update 2.2.1: One or more integrations have been reset because of a change to their xml configs. #12095: Update 2.2.1: One or more integrations have been reset because of a change to their xml configs

Manual testing scenarios

1. Create config based integration etc/integration.xml with "Magento_Catalog::catalog" resource and without "endpoint_url", "identity_link_url"
2. run setup:upgrade so the integration is created
3. activate integration in admin area under "System -> Integrations"
4. run setup:upgrade again - the integration should stay as "Authorized" but it is "Reset" due the issue described above

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)

[therool]

@omiroshnichenko can you please tell me how to fix https://app.codacy.com/app/vrann/magento2/pullRequest?prid=1423301?

[omiroshnichenko]

@therool You can ignore it.

[magento-cicd2]

All committers have signed the CLA.

[sidolov]

Hi @therool , please, sign CLA, otherwise, we can't process your pull request

[magento-engcom-team]

Hi @sidolov, thank you for the review.
ENGCOM-2723 has been created to process this Pull Request

[magento-engcom-team]

@therool thank you for contributing. Please accept Community Contributors team invitation here to gain extended permissions for this repository.

[magento-engcom-team]

Hi @therool. 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.