[PDI-9598] toggling KETTLE_EMPTY_STRING_DIFFERS_FROM_NULL variable has no effect on whether a field is recognized as empty or not empty ("Switch/Case" step)
Merge pull request #305 from stepanovdg/PDI-9598

[PDI-9598] toggling KETTLE_EMPTY_STRING_DIFFERS_FROM_NULL variable has no effect on whether a field is recognized as empty or not empty ("Switch/Case" step)