hg: jdk/sandbox: 8242314: use reproducible random in vmTestbase shared code

[chris.hegarty at oracle.com]

Changeset: ebef633f69a5
Author:    iignatyev
Date:      2020-04-28 20:49 -0700
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/ebef633f69a5

8242314: use reproducible random in vmTestbase shared code
Reviewed-by: kbarrett, lmesnik

! test/hotspot/jtreg/vmTestbase/ExecDriver.java
! test/hotspot/jtreg/vmTestbase/nsk/share/gc/NonbranchyTree.java
! test/hotspot/jtreg/vmTestbase/nsk/share/jdi/SerialExecutionDebugger.java
! test/hotspot/jtreg/vmTestbase/nsk/share/runner/RunParams.java
! test/hotspot/jtreg/vmTestbase/nsk/share/test/LocalRandom.java
! test/hotspot/jtreg/vmTestbase/nsk/sysdict/share/SysDictTest.java
! test/hotspot/jtreg/vmTestbase/vm/share/RandomEx.java