RFR(s): Backport of 8046715 - Add a way to verify an extended set of command line options

[Jesper Wilhelmsson]

Hi,

Backport of 8046715 (Add a way to verify an extended set of command line options).

The patch applied with an offset, so a new review is required I believe.

Webrev: http://cr.openjdk.java.net/~jwilhelm/8046715/webrev.jdk8/

Bug: https://bugs.openjdk.java.net/browse/JDK-8046715

JDK 9 change: http://hg.openjdk.java.net/jdk9/hs-gc/hotspot/rev/c0b3ddf06856

Thanks!
/Jesper