polling SQS via docker Python script

[kingfischer16]

Let's use Python because... Python. Every container will startup and immediately execute a run_mldeploy.py file (or some other suitable name). This file needs to:

• Get the SQS queue name
• Forever loop through polling the queue for a single job and then:
  • executing that job if found, then deleting the job from the queue upon completion
  • waiting some time (10s, 30s, 5 minutes?) then polling again
• If something interrupts this flow and causes an exit, the instance needs to be reported as unhealthy so a new one can replace it and start working.

Custom health status: https://docs.aws.amazon.com/autoscaling/ec2/userguide/healthcheck.html