Configure output for kubernetes and docker and parsl workflow to write to file

[julietcohen]

The kubernetes and docker and parsl workflow currently outputs logging statements to the terminal that communicate a lot of information, including the number active tasks, active slots, connected workers, etc . These statements include DEBUG level logging, so this results in a constant stream of output that is hard to search through. An easy solution to this would be to configure parsl to output these logging statements to a file instead. Parsl has this functionality, like using parsl.set_file_logger() or setting up logging settings like in this stack overflow post. Note that this logging is different than the viz workflow logging, which is already set up to write to a log.log file.

[julietcohen]

This issue is a sub-task towards the ultimate goal of issue#1

[mbjones]

@julietcohen related to your ticket: DataONEorg/k8s-cluster#43 @artntek has made good progress towardds setting up centralized, searchable logging on the cluster