RFR: 7145419 - Ignore events from oracle packages in test.

[Rickard Bäckman]

Hi,

I would like to get reviews for CR 7145419, where we have a test that 
sometimes fails when getting events from background threads. The test 
should ignore those events.

Webrev: http://cr.openjdk.java.net/~rbackman/7145419/webrev/

Thanks
/R