Improve Logging Flexibility

[andrewgross]

We probably want a way to override our log formatting.

[zach-brown-hpa]

@andrewgross would silencing the logger lines from get_queue_urls_from_queue_prefixes fall within the scope of this issue? Not sure exactly what you had in mind since this issue is broad. Specifically I'm referring to the logger lines:

"Loading Queues:" followed by a list of all queues monitored -

PyQS/pyqs/worker.py

Line 401 in a983ce1

logger.info("Loading Queues:")

"Found matching SQS queues..."

PyQS/pyqs/worker.py

Line 408 in a983ce1

logger.info("Found matching SQS Queues: {}".format(matching_urls))

These logger lines grow the logger file quickly and get in the way of the rest of the logging lines from the user's application.