Updated unit test for BigInteger patch (#4837946)

[Tim Buktu]

On 01/11/2012 11:59 AM, Joe Darcy wrote:
> Thanks Tim.  I'll add this to my review queue after Alan Eliasen's work
> (finally) gets in.

Sounds good.

I wanted to point out that my patch includes Alan's and it applies to
the latest JDK8 sources without any manual merging, so it should be less
work than first applying Alan's patch and then mine.
On the other hand, doing Alan's patch first means less code to review at
a time.

Tim