Adjust SQS redrive policy for production

[asjohnston-asf]

The SQS is currently configured to quickly send messages that cannot be processed to the dead letter queue. We'll want to adjust those settings to messages are retried more times over a longer period as appropriate for an operational workload.

https://github.com/ASFHyP3/its-live-monitoring/blob/develop/cloudformation.yml#L42-L49

• VisibilityTimeout is the time between attempts
• maxReceiveCount is the total number of attempts

https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-sqs-queue.html

[jhkennedy]

Generally, our current settings have worked well for Landsat processing.

Significant changes are coming in #74 with the Sentinel-2 support, so I'm going to leave this open for now as we'll want to watch/monitor for a while after those changes.