Add ACCS Auto Scaling Policy

[scross01]

Add a new resource to create an automatic (auto) scaling policy for an Oracle Application Container Cloud Service instance to defines rules and conditions for when to automatically scale the service instance.

Create an Auto Scaling Policy

The resource style should be similar to the JCS Autoscaling Policy for consistency

resource "oraclepaas_application_autoscaling_policy" "example" {
   service_instance = "${oraclepaas_application_container.example.name}"
   name = "my-auto-scale-policy"
   policy {
      operation = "scaleOut"
      alarm {
          metric_name = "CPUUtilization"
          metric_unit = "percent"
          statistic = "AVG"
          comparison_operator = "GreaterThanOrEqualToThreshold"
          threshold = 80
          sample_count = 3
          sample_frequency = 10
          breached_on_instance = "ALL"
      }
      cool_down_period = 30
      max_cluster_size = 4
  }
}