RFR (S) 8247751: Shenandoah: options tests should run with smaller heaps

[Zhengyu Gu]

Looks good.

-Zhengyu

On 6/17/20 7:44 AM, Aleksey Shipilev wrote:
> RFE:
>    https://bugs.openjdk.java.net/browse/JDK-8247751
> 
> On huge machines, the default heap sizes are quite large, and memory zapping takes quite some time
> to startup in fastdebug mode. We should be running at least "options" tests with smaller default heaps.
> 
> Fix:
>    https://cr.openjdk.java.net/~shade/8247751/webrev.01/
> 
> Testing: hotspot_gc_shenandoah (faster now)
>