RFR: Retry to fix ShenandoahStrDedupStree OOM

[Aleksey Shipilev]

On 07/19/2018 01:40 PM, Zhengyu Gu wrote:
> Old default live string size (3000000) is prone to OOM.
> 
> Reduce default live string size and increase string mutations for heuristics other than adapative,
> who seems to handle live size better and need bigger size to trigger enough GC cycles.
> 
> Webrev: http://cr.openjdk.java.net/~zgu/shenandoah/strdedup_stress_retry/webrev.00/

OK, let's try to fly with that.

-Aleksey