CORE-5386 Updated file_parameters conversions.

Renamed more obsolete columns.
Fixed parameters conversion to set required field from its corresponding file_parameters required field as well.
Fixed parameter_values conversion to also add rows for output filenames.
CORE-5832 CORE-5386 Updated /apps/:app-id/ui response.

Added label to task_param_listing view.
Added label and param value (for outputs) to JSON response.