RFR(S): [testbug] CommitOverlappingRegions.java can not deal with pages > 32K

[Lindenmaier, Goetz]

Hi,

On ppc, we often have 64K pages.  Commit/uncommit with 32K quantities fails
If not page aligned.

Fix: increase the granularity of the mapped chunks if the pagesize is > 32K.
The Strings for test result checking must be adapted.

Please review this change. I please need a sponsor.
http://cr.openjdk.java.net/~goetz/wr16/8158929-CommitOverlap/webrev.01/

Best regards,
  Goetz.