RFR: 8043639: Backout JDK-8034852: Shrinking of Metaspace high-water-mark causes incorrect OutOfMemoryErrors or back-to-back GCs

[Erik Helin]

Hi all,

this is an "anti-patch" that backs out:
https://bugs.openjdk.java.net/browse/JDK-8034852

(commit dd531b743c04 in the jdk9/hs-gc repo, this commit has *not*
been pushed upstream to jdk9/hs).

The patch was created by `hg rollback dd531b743c04` and it applied
cleanly.

Webrev:
http://cr.openjdk.java.net/~ehelin/8043639/webrev.00/

I'm currently working on fixing this, but the fix was slightly
trickier than expected, so I will need some more time.

Thanks,
Erik