[BUGFIX] Align empty values to null instead of empty string as legacy…

[twoldanski]

… return

[coveralls]

Pull Request Test Coverage Report for Build 9204068827

Details

• 2 of 2 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.02%) to 65.972%

---

Totals
Change from base Build 9160813032:	0.02%
Covered Lines:	950
Relevant Lines:	1440

---

💛 - Coveralls