Prevent exception when option text converts to false

[pmclain]

Description (*)

The function would incorrectly through an exception when the option text was
set to a string that would evaluate to false such as "0"

Fixed Issues (if relevant)

1. OptionManagement.validateOption throws NoSuchEntityException for "0" option label #13083 OptionManagement.validateOption throws NoSuchEntityException for "0" option label

Manual testing scenarios (*)

1. Create a product attribute of 'dropdown' type via admin page with one option (Admin value: 0, Default Store View value: 0)
2. Programmatically delete the option using OptionManagement.delete method
3. The option should be delete w/o any errors

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)

[magento-engcom-team]

Hi @pmclain. 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:

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[magento-engcom-team]

Hi @sidolov, thank you for the review.
ENGCOM-3236 has been created to process this Pull Request

[magento-engcom-team]

Hi @pmclain. Thank you for your contribution.
We will aim to release these changes as part of 2.3.1.
Please check the release notes for final confirmation.