RFR (S): 8219098: Make output of region strings more regular in error messages

[Thomas Schatzl]

Hi all,

  can I have reviews for this change that improves (regularizes) the
output of verification error messages to use the existing
HR_FORMAT/HR_FORMAT_PARAMS that include the HeapRegion number instead
of fixing this in every message?

The HeapRegion number is much more easy to read and understand than a
set of addresses.

I.e. this has been the n-th time I had added region numbers to these
messages manually while debugging some other changes, and so I thought
it would be worthwhile fixing this in mainline.

CR:
https://bugs.openjdk.java.net/browse/JDK-8219098
Webrev:
http://cr.openjdk.java.net/~tschatzl/8219098/webrev/
Testing:
compilation

Thanks,
  Thomas