Fix Functional Test Magento\Sales\Test\TestCase\CreateOrderBackendPartOneTest::test with data set "CreateOrderBackendTestVariation1_0"

[p-bystritsky]

Preconditions

1. Magento 2

Steps to reproduce

1. Run Functional Test Magento\Sales\Test\TestCase\CreateOrderBackendPartOneTest::test with data set "CreateOrderBackendTestVariation1_0"

Expected result

1. Test should pass successfully.

Actual result

1. Form data not equals to passed from fixture:
   quantity_and_stock_status:
   • qty: "63" instead of "62"
     Failed asserting that false is true.

Note

In Magento without MSI products are deducted from Stock immediately after Order is placed, but in Magento with MSI only after Order is shipped / invoiced.

[p-bystritsky]

Should be fixed in #1164