RFR: Unclutter ShenandoahHeap, take 3

[Roman Kennke]

> http://cr.openjdk.java.net/~shade/shenandoah/unclutter-sh-heap-3/webrev.01/
> 
> This is hopefully final bunch of touchups to ShenandoahHeap for a while. Patch train includes:
> 
>  *) Remove unused ShenandoahEvacuateRootsClosure
>  *) Rename ShHeap::shenandoahPolicy -> ShHeap::shenandoah_policy
>  *) Handle ShHeap::time_since_last_millis for RMI users
>  *) Inline ShHeap::monitoring_support into header
> 
> Testing: tier1_gc_shenandoah {fastdebug|release}, tier3_gc_shenandoah (running)
> 
> Thanks,
> -Aleksey
> 


Ok. Thanks!