RFR(S/M) : 8243436 : use reproducible random in :vmTestbase_nsk_monitoring

[Igor Ignatyev]

http://cr.openjdk.java.net/~iignatyev/8243436/webrev.00
> 305 lines changed: 76 ins; 11 del; 218 mod;

Hi all,

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

testing: : vmTestbase_nsk_monitoring test group
JBS: https://bugs.openjdk.java.net/browse/JDK-8243436
webrevs:
- code changes: http://cr.openjdk.java.net/~iignatyev//8243436/webrev.00.code
> 19 lines changed: 5 ins; 11 del; 3 mod;
- adding k/w: http://cr.openjdk.java.net/~iignatyev//8243436/webrev.00.kw
> 141 lines changed: 71 ins; 0 del; 70 mod; 
- full: http://cr.openjdk.java.net/~iignatyev//8243436/webrev.00
> 305 lines changed: 76 ins; 11 del; 218 mod;

Thanks,
-- Igor