Add parameter to include task name in all output files (including maps and extradata)

Parallel processing files is currently awkward -- it must either be done by creating map and extradata files from object files or creating parallel iterations.

Suggest true/false_taskNameBasedFiles_ parameter, default to current behavior. Setting it to true would include task name in maps and extradata files as is done with object files. Expectation would be that IC would manage these files manually/separately. This most useful for bibs and holdings (MARC and CSV based) tasks.

Aside from simplifying parallel processes, the feature would simplify combining task output from different sources requiring different maps.