RFR: 8170953: CheckResourceKeys tests should declare the resource package to be open

[Mandy Chung]

> On Dec 8, 2016, at 4:48 PM, Jonathan Gibbons <jonathan.gibbons at oracle.com> wrote:
> 
> Simple change to add update tests examining resources to open the packages.
> 
> JBS: https://bugs.openjdk.java.net/browse/JDK-8170953
> Webrev: http://cr.openjdk.java.net/~jjg/8170953/webrev.00

Looks good.  Thanks for fixing it.

Mandy