hg: jdk/sandbox: 8202169: Reduce ctw_2 duration by parallelizing CtwRunner invocations

[chris.hegarty at oracle.com]

Changeset: 29419b836244
Author:    mikael
Date:      2018-04-24 21:40 -0700
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/29419b836244

8202169: Reduce ctw_2 duration by parallelizing CtwRunner invocations
Reviewed-by: kvn, iignatyev

! test/hotspot/jtreg/TEST.groups
! test/hotspot/jtreg/applications/ctw/modules/java_base.java
+ test/hotspot/jtreg/applications/ctw/modules/java_base_2.java
! test/hotspot/jtreg/applications/ctw/modules/java_desktop.java
+ test/hotspot/jtreg/applications/ctw/modules/java_desktop_2.java
! test/hotspot/jtreg/testlibrary/ctw/src/sun/hotspot/tools/ctw/CtwRunner.java