RFR (XXS): 8134856: Incorrect use of PLAB::min_size() in MaxPLABSizeBounds

[Thomas Schatzl]

Hi all,

  can I have reviews for this small change that fixes some error message
when you specify a too large Young- or OldPLABSize?

Instead of printing the maximum PLAB size, the error message contains
the minimum PLAB size.

The change is just one line, but the test is a bit longer.

CR:
https://bugs.openjdk.java.net/browse/JDK-8134856
Webrev:
http://cr.openjdk.java.net/~tschatzl/8134856/webrev/
Testing:
jprt

Thanks,
  Thomas