Description of TaskFlow configuration options

Configuration option = Default value	Description
[taskflow_executor]
conversion_format = None	(StrOpt) The format to which images will be automatically converted.
engine_mode = parallel	(StrOpt) The mode in which the engine will run. Can be 'serial' or 'parallel'.
max_workers = 10	(IntOpt) The number of parallel activities executed at the same time by the engine. The value can be greater than one when the engine mode is 'parallel'.