[vector] tests with data providers

[Paul Sandoz]

Patch rebased and updated for the comparison methods:

  http://cr.openjdk.java.net/~psandoz/panama/tests-with-data-providers/webrev/ 

Paul.

> On Mar 9, 2018, at 5:12 PM, Paul Sandoz <Paul.Sandoz at oracle.com> wrote:
> 
> Hi,
> 
> Please review this patch to covert the vector tests to use TestNG data providers:
> 
>  http://cr.openjdk.java.net/~psandoz/panama/tests-with-data-providers/webrev/ <http://cr.openjdk.java.net/~psandoz/panama/tests-with-data-providers/webrev/>
> 
> For now i took the simplest route placing them in the concrete tests rather than in a super class for a type shared across the shapes (in effect much in the header.template can be moved over to such a super class).
> 
> Paul.