Add engine_version parameter to the Redis example
Add engine_version parameter to the Redis example

If you don't have this parameter and try to apply this example, you get an error:


* aws_elasticache_cluster.archivematica: 1 error(s) occurred:

* aws_elasticache_cluster.archivematica: error creating Elasticache Cache Cluster: InvalidParameterCombination: Expected a parameter group of family redis5.0 but found one of family redis3.2
	status code: 400, request id: 95e5e568-103a-11e9-9d09-854b4ad5a13d
Ninir/terraform-provider-aws,terraform-providers/terraform-provider-aws,Ninir/terraform-provider-aws,kjmkznr/terraform-provider-aws,terraform-providers/terraform-provider-aws,kjmkznr/terraform-provider-aws,Ninir/terraform-provider-aws,terraform-providers/terraform-provider-aws,kjmkznr/terraform-provider-aws,terraform-providers/terraform-provider-aws,Ninir/terraform-provider-aws,kjmkznr/terraform-provider-aws