RFR (S): 8074546: Rename and clean up the ParGCAllocBuffer class

[Kim Barrett]

On Apr 3, 2015, at 11:30 AM, Joseph Provino <joseph.provino at oracle.com> wrote:
> 
> ParGCAllocBuffer is changed to PLAB and G1ParGCAllocBuffer is changed to G1PLAB.
> 
> parGCAllocBuffer.* is changed to plab*.
> 
> CR:  https://bugs.openjdk.java.net/browse/JDK-8074546
> 
> webrev:  http://cr.openjdk.java.net/~jprovino/8074546/webrev.00
> 
> Test:  jprt

Looks good.