RFR (S): 8004924: NPG: jmap -heap output should contain ClassMetaspaceSize value

[Erik Helin]

Hi all,

the following change adds the flag ClassMetaspaceSize to the output of 
jmap -heap.

Please note that the webrev does not show the whitespace changes, the 
output has been realigned (see the patch).

Webrev:
http://cr.openjdk.java.net/~ehelin/8004924/webrev.00/

Bug:
http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=8004924

Testing:
JPRT
Also wrote a new test using the newly added testlibrary.

Please note that if you are running this test on Ubuntu, then jtreg 
needs to be run as sudo, because you can't use jmap to attach to your 
own processes as a regular user on Ubuntu.

Thanks,
Erik