DINT-1336 Enforce numeric discount amount

[benjaminkalk]

Description

0 discount amounts are coming through as strings causing AEP batch processing errors. Going to enforce in handler to correct any upstream variance. Also, adding try catch as Number coercion can throw errors.

Related Issue

https://jira.corp.adobe.com/browse/DINT-1336

Motivation and Context

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• [x] I have signed the Adobe Open Source CLA.
• [x] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [x] I have read the CONTRIBUTING document.
• [ ] I have added tests to cover my changes.
• [x] All new and existing tests passed.