RFR (M) 8198313: Wrap holder object for ClassLoaderData in a WeakHandle

[Kim Barrett]

> On Apr 9, 2018, at 6:21 PM, coleen.phillimore at oracle.com wrote:
> This is the incremental change:
> 
> http://cr.openjdk.java.net/~coleenp/8198313.incr.05/webrev/index.html
> 
> Full changes:
> 
> open webrev at http://cr.openjdk.java.net/~coleenp/8198313.05/webrev
> 
> Thanks,
> Coleen
>> 
>> ------------------------------------------------------------------------------

Looks good.