generic data operator requires specific data file format

[ianwow]

The generic data operator only works for data files in a format like Rekognition uses. If a user specifies a data file with a different JSON schema, then the generic data operator may appear to complete without error even though it fails to actually save data to the dataplane.

Before resolving this issue, make sure the generic data operator persist any valid JSON data input AND if it fails to persist said data then make sure the workflow is marked failed.

Make sure the operator can save both the following JSON documents:

{"this": "should work"}

and

[{"this": "should also work"}]