RFR: 8171045: gc/stress/TestStressG1Humongous.java fails to allocate the heap

[Michail Chernov]

Hi,

Could I have a reviews for this small change for one test, please?

http://cr.openjdk.java.net/~mchernov/8171045/webrev.00/
https://bugs.openjdk.java.net/browse/JDK-8171045

Sometimes test failed with error:

Error occurred during initialization of VM
Could not reserve enough space for 1048576KB object heap

This happens on 32 bit systems. Now the test limits heap size to 512 M.

Testing via RBT was done.

Thanks,
Michail