PowerShell issue - empty string is upserted as NULL in DB

[VasuBhog]

Microsoft.Azure.WebJobs.Extensions.Sql.Tests.Integration.SqlOutputBindingIntegrationTests.AddProductParamsTest(id: 0, name: "", cost: 0, lang: PowerShell) [FAIL]

When executing scalar select Name from Products where ProductId=0
Expected: (System.String)
Actual: (System.DBNull)

This seems to be due PowerShell worker that treats empty string as Null.

[VasuBhog]

Fixed by a workaround, but further tracked here: #535