RFR: 8155524: HotCardCache shouldn't be part of ConcurrentG1Refine

[Kim Barrett]

> On Apr 29, 2016, at 4:37 PM, Jon Masamitsu <jon.masamitsu at oracle.com> wrote:
> 
> Kim,
> 
> Changes look good.

Thanks Jon.

> 
> http://cr.openjdk.java.net/~kbarrett/8155524/webrev.00/src/share/vm/gc/g1/g1RemSetSummary.hpp.udiff.html
> 
> The only difference I see above is the copyright update.

Oops.  There were more changes here that got backed out for later work.
But I forgot to back out the copyright update.