Luminex test failure fix - transform script null run properties are being written to runProperties.tsv as "null" instead of ""

[cnathe]

Rationale

LuminexPositivityTest and LuminexAsyncImportTest started failing recently in develop. Turns out the runProperties.tsv file for the transform script was writing null values as "null" instead of "". This was related to the StringUtils.defaultString() - Objects.toString() change from this PR #6742

Related Pull Requests

• Minor auto-refactor code cleanup on a massive scale #6742

Changes

• set nullDefault param as "" for Object.toString()

[cnathe]

@josheckels do you think any of the other cases that changed from StringUtils.defaultString() to Objects.toString() need to add this nullDefault parameter as "" to match previous behavior?

[labkey-jeckels]

Thanks Cory. I thought I had tracked down all of these single-argument calls to toString() in the refactor to avoid this problem, but it looks like this snuck through. I double-checked for other examples in my big refactor commit and couldn't find any.