RFR(S) : 8243427 : use reproducible random in :vmTestbase_vm_mlvm

[Igor Ignatyev]

http://cr.openjdk.java.net/~iignatyev/8243427/webrev.00
> 48 lines changed: 16 ins; 15 del; 17 mod;


Hi all,

could you please review this small patch?
from JBS:
> this subtask is to use j.t.l.Utils.getRandomInstance() as a random number generator, where applicable, in :vmTestbase_vm_mlvm test group and marking the tests which make use of "randomness" with a proper k/w.


JBS: https://bugs.openjdk.java.net/browse/JDK-8243427
testing: :vmTestbase_vm_mlvm test group
webrev:
 - code changes: http://cr.openjdk.java.net/~iignatyev/8243427/webrev.00.code/
 - adding k/w: http://cr.openjdk.java.net/~iignatyev//8243427/webrev.00.kw/
 - full: http://cr.openjdk.java.net/~iignatyev/8243427/webrev.00

Thanks,
-- Igor