Fix always reporting fail even on success

Avoid false-positives like (notice lack of stacktrace logging too):
```
16:36:00,592 ERROR {} Ec2Instance(instanceId = i-080edd5933a74418f) failed to release itself
16:36:30,577 ERROR {} Ec2Instance(instanceId = i-061f9c1f94990848e) failed to release itself
```

CHANGELOG.md

@@ -30,6 +30,7 @@ Dropping a requirement of a major version of a dependency is a new contract.
 - Add missing `iam:GetRole` permission. You have to update the policy manually. Fix [JPERF-1407].
 - Reduce pressure on CloudFormation when cleaning long lists of expired stacks. Help [JPERF-1332].
 - Clean up EC2 security groups before CloudFormation stacks. Fix [JPERF-1208].
+- Fix housekeeping fail logging.
 
 [JPERF-1407]: https://ecosystem.atlassian.net/browse/JPERF-1407
 [JPERF-1332]: https://ecosystem.atlassian.net/browse/JPERF-1332

src/main/kotlin/com/atlassian/performance/tools/aws/api/housekeeping/ConcurrentHousekeeping.kt

@@ -57,7 +57,7 @@ class ConcurrentHousekeeping(
         if (!resource.isExpired()) {
             throw Exception("You can't release $resource. It hasn't expired.")
         }
-        return resource.release().handle { throwable, _ ->
+        return resource.release().handle { _, throwable: Throwable? ->
             if (throwable != null) {
                 logger.error("$resource failed to release itself", throwable)
             }