Fix stock qty threshold trigger

[thomas-kl1]

Description (*)

This change fix the priority in condition for the minQty.
Before this change, wether or not the backorder were enabled, it had the same result (basically it was if has no backorder, or has backorder).

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)

Resolved issues:

1. resolves [Issue] Fix stock qty threshold trigger #3432: Fix stock qty threshold trigger

[thomas-kl1]

See #3424

[engcom-Hotel]

@magento run all tests

[engcom-Hotel]

@magento create issue

[engcom-Hotel]

Hello @thomas-kl1,

Please go through our comment here and let us know if we missed anything:

#3432 (comment)

Meanwhile moving this PR on hold.

Thanks