RFR: 8146665: Test jdk/test/java/util/logging/LogManager/Configuration/updateConfiguration/UpdateConfigurationTest.java fails - missing expected output

[Mandy Chung]

> On Jan 9, 2016, at 7:40 AM, Daniel Fuchs <daniel.fuchs at oracle.com> wrote:
> 
> 
> It's probably better to call gc() at least once before calling poll().
> 
>> Are you able to reproduce the failure?
> 
> No - I have tried to run the test with the same set of options
> on my local machine but never managed to make it fail.

OK.

> The suppressed == null check should make it possible to see the
> actual failure next time it fails, if it fails again.
> Maybe that will be more informative.

Good to push this fix and see if the intermittent will still be reproduced.

Mandy