#22869 - defaulting customer storeId fix

[Wirson]

Description (*)

Fix prevent saving default customer storeId if one was not passed in rest request. StoreId is taken from previously loaded customer data if none is provided.

Fixed Issues (if relevant)

1. REST: Updating a customer without store_id sets the store_id to default  #22869: REST: Updating a customer without store_id sets the store_id to default

Manual testing scenarios (*)

1. use steps provided in issue description

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]

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[VladimirZaets]

Hi @Wirson. Thanks for collaboration. Please fix the integration tests.

[magento-engcom-team]

Hi @VladimirZaets, thank you for the review.
ENGCOM-5116 has been created to process this Pull Request

[Wirson]

Hi @Wirson. Thanks for collaboration. Please fix the integration tests.

No tests failed, several were skipped.

[magento-engcom-team]

Hi @VladimirZaets, thank you for the review.
ENGCOM-5116 has been created to process this Pull Request

[soleksii]

✔️ QA Passed

Before:

After:

[m2-assistant]

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