hg: shenandoah/jdk9/hotspot: [backport] Temporarily disable String deduplication

[ashipile at redhat.com]

Changeset: bd88b0cd611f
Author:    shade
Date:      2017-11-17 17:47 +0100
URL:       http://hg.openjdk.java.net/shenandoah/jdk9/hotspot/rev/bd88b0cd611f

[backport] Temporarily disable String deduplication

! src/share/vm/runtime/arguments.cpp
! test/gc/shenandoah/ShenandoahStrDedupStress.java
! test/gc/shenandoah/TestShenandoahStrDedup.java