RFR: Refactor BrooksPointer asserts

[Zhengyu Gu]

Looks good.

-Zhengyu

On 06/14/2017 03:30 PM, Aleksey Shipilev wrote:
> It makes sense to refactor BrooksPointer asserts to print more data about the
> assert. Nominally, the actual values for the broken ptrs. It seems cleaner to
> move everything to Verifier for this.
>
> Fix:
>   http://cr.openjdk.java.net/~shade/shenandoah/verifier-brooksptr/webrev.01/
>
> Testing: hotspot_gc_shenandoah
>
> -Aleksey
>