Add new check: Check if all Elasticache Replication Group encryption parameters are enabled and set #43
Description
It would be nice to validate if all encryption features for AWS Elasticache Replication Group are enabled.
From https://www.terraform.io/docs/providers/aws/r/elasticache_replication_group.html:
- at_rest_encryption_enabled - (Optional) Whether to enable encryption at rest.
- transit_encryption_enabled - (Optional) Whether to enable encryption in transit.
- auth_token - (Optional) The password used to access a password protected server. Can be specified only if transit_encryption_enabled = true.
- kms_key_id - (Optional) The ARN of the key that you wish to use if encrypting at rest. If not supplied, uses service managed encryption. Can be specified only if at_rest_encryption_enabled = true.