RFR: [10+9] Temporarily disable String deduplication

[Zhengyu Gu]

Okay.

-Zhengyu

On 11/17/2017 11:17 AM, Aleksey Shipilev wrote:
> http://cr.openjdk.java.net/~shade/shenandoah/strdedup-disable/webrev.01/
> 
> We have identified some problems with experimental implementation of String Dedup. Let's disable it
> until we fix it, hopefully soon. This changes makes tests reliably pass, and protects users from
> using potentially broken feature. I would push the variant of this fix to sh/jdk9 too.
> 
> Testing: hotspot_gc_shenandoah
> 
> Thanks,
> -Aleksey
>