0.17.0 Add configurable retention period for cluster logs

what

• Add configurable retention period for cluster logs

why

• If you add audit or other log types to the module then on cluster creation AWS will create the log group for you.
  It creates the log group with an unlimited retention period by default.
  If you then want to update the retention period you need to terraform import the log group and adjust.
  This release makes it possible to create a log group with configurable log types and log retention period.

references

• https://www.terraform.io/docs/providers/aws/r/eks_cluster.html#enabling-control-plane-logging