RFR (S): (7u60,8u20,9) 8032771 Need test to cover JDK-8013132

[Thomas Schatzl]

Hi all,

  can I have reviews for the following small change? It adds a unit test
for the VerifySilently option.

This has been asked for by sqe while looking at the recent nmethod
backport, so it should go all the way down to 7u60 (it is missing in all
versions).

It is the same webrev for all versions, as it just adds the missing
regression test, so I am asking for reviews for versions at once. :)

The test simply spawns a VM that is checked for the verification
messages. When VerifySilently is enabled, there should be no messages at
all, otherwise there should be.

Webrev:
http://cr.openjdk.java.net/~tschatzl/8032771/webrev/

Bug:
https://bugs.openjdk.java.net/browse/JDK-8032771

Testing:
local jtreg, jprt with jtreg test

Thanks,
Thomas