resource/lb_listener_rule: avoid breaking change for default rule pri…

…ority

aws/resource_aws_lb_listener_rule.go

@@ -38,7 +38,7 @@ func resourceAwsLbbListenerRule() *schema.Resource {
 				Type:         schema.TypeInt,
 				Required:     true,
 				ForceNew:     true,
-				ValidateFunc: validateIntegerInRange(1, 50000),
+				ValidateFunc: validateAwsLbListenerRulePriority,
 			},
 			"action": {
 				Type:     schema.TypeList,
@@ -154,10 +154,10 @@ func resourceAwsLbListenerRuleRead(d *schema.ResourceData, meta interface{}) err
 
 	// Rules are evaluated in priority order, from the lowest value to the highest value. The default rule has the lowest priority.
 	if *rule.Priority == "default" {
-		d.Set("priority", 50000)
+		d.Set("priority", 99999)
 	} else {
 		if priority, err := strconv.Atoi(*rule.Priority); err != nil {
-			return errwrap.Wrapf("Cannot convert rule priority %q to int: {{err}}", err)
+			return fmt.Errorf("Cannot convert rule priority %q to int: {{err}}", err)
 		} else {
 			d.Set("priority", priority)
 		}
@@ -276,6 +276,14 @@ func resourceAwsLbListenerRuleDelete(d *schema.ResourceData, meta interface{}) e
 	return nil
 }
 
+func validateAwsLbListenerRulePriority(v interface{}, k string) (ws []string, errors []error) {
+	value := v.(int)
+	if value < 1 || (value > 50000 && value != 99999) {
+		errors = append(errors, fmt.Errorf("%q must be in the range 1-50000 for normal rule or 99999 for default rule", k))
+	}
+	return
+}
+
 func validateAwsListenerRuleField(v interface{}, k string) (ws []string, errors []error) {
 	value := v.(string)
 	if len(value) > 64 {