provider/aws: refresh state on SQS Queue not found (hashicorp#6381)

When an SQS queue was deleted from the AWS Console, an error was thrown
to say that the Queue could not be found. This is now fixed to remove
the queue from the state on a specific not found exception

builtin/providers/aws/resource_aws_sqs_queue.go

@@ -10,6 +10,7 @@ import (
 	"github.com/hashicorp/terraform/helper/schema"
 
 	"github.com/aws/aws-sdk-go/aws"
+	"github.com/aws/aws-sdk-go/aws/awserr"
 	"github.com/aws/aws-sdk-go/service/sqs"
 )
 
@@ -177,6 +178,14 @@ func resourceAwsSqsQueueRead(d *schema.ResourceData, meta interface{}) error {
 	})
 
 	if err != nil {
+		if awsErr, ok := err.(awserr.Error); ok {
+			log.Printf("ERROR Found %s", awsErr.Code())
+			if "AWS.SimpleQueueService.NonExistentQueue" == awsErr.Code() {
+				d.SetId("")
+				log.Printf("[DEBUG] SQS Queue (%s) not found", d.Get("name").(string))
+				return nil
+			}
+		}
 		return err
 	}