hg: jdk9/hs-comp: 8151280: update hotspot tests to use vm.compMode instead of their own logic

[tatiana.pivovarova at oracle.com]

Changeset: 5ea2b072ce98
Author:    tpivovarova
Date:      2016-07-13 18:03 +0300
URL:       http://hg.openjdk.java.net/jdk9/hs-comp/rev/5ea2b072ce98

8151280: update hotspot tests to use vm.compMode instead of their own logic
Summary: Update hs compiler tests to use vm.compMode instead of their own logic and to get VM mode using j.t.l.Platform
Reviewed-by: kvn, dpochepk
Contributed-by: igor.ignatyev at oracle.com

! test/lib/share/classes/jdk/test/lib/Platform.java