Move all Shenandoah runtime entry points to ShenandoahRuntime

[Aleksey Shipilev]

On 06/14/2018 11:29 AM, Roman Kennke wrote:
> Both done:
> Incremental:
> http://cr.openjdk.java.net/~rkennke/shenandoahrt/webrev.01.diff/
> Full:
> http://cr.openjdk.java.net/~rkennke/shenandoahrt/webrev.01/

Excellent, good to go.

-Aleksey