RFR: 8157452: [TESTBUG] PLAB tests don't handle unexpected GC

[Thomas Schatzl]

Hi Michail,

On Mi, 2016-05-25 at 20:27 +0300, Michail Chernov wrote:
> Hi,
> 
> Could I have a couple of reviews for this change please?
> 
> https://bugs.openjdk.java.net/browse/JDK-8157452
> http://cr.openjdk.java.net/~mchernov/8157452/webrev.00/
> 
> This change improves handling of unexpected GC during testing.
> Both PLAB tests expect to find in log only WhiteBox initiated GC.
> 
> Testing was performed on different configurations.
> 

  looks good.

Thomas