Quietly ensure that JSON is stringified if an object payload is passed in on FeatureService add (features), update (features) and edit (edits).
Add and Delete tests for featureService
Add Update tests.
Fix multiple stringify properties code.
Full set of tests, broken into Suites and Batches appropriately.
Refactor
Fix refactor.
Remove auto-stringify of Edits since no test exists.
Improve JSON Parsing exception handler.