Added integration test for Magento\Sales\Cron\CleanExpiredQuotes class.

[p-bystritsky]

Description (*)

Added integration test for Magento\Sales\Cron\CleanExpiredQuotes class.

Fixed Issues (if relevant)

1. None

Manual testing scenarios (*)

1. Run Magento\Sales\Cron\CleanExpiredQuotesTest.

Questions or comments

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 are green)

[m2-assistant]

Hi @p-bystritsky. 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 give me test instance - deploy test instance based on PR changes
• @magento give me 2.3-develop instance - deploy vanilla Magento instance

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[magento-engcom-team]

Hi @sidolov, thank you for the review.
ENGCOM-6002 has been created to process this Pull Request
✳️ @sidolov, could you please add one of the following labels to the Pull Request?

Label	Description
Auto-Tests: Covered	All changes in Pull Request is covered by auto-tests
Auto-Tests: Not Covered	Changes in Pull Request requires coverage by auto-tests
Auto-Tests: Not Required	Changes in Pull Request does not require coverage by auto-tests

[m2-assistant]

Hi @p-bystritsky, thank you for your contribution!
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