RFR (S): 8040001: CLI test on RTMRetryCount option was missed from fix for 8039496

[Filipp Zhinkin]

Hi all,

while backporting CLI tests on RTM-related options,
I found that forgot to add test on RTMRetryCount.

This fix intended to add the missed test.

Webrev: http://cr.openjdk.java.net/~iignatyev/fzhinkin/8040001/webrev.00/
Testing: manual & automated

Thanks,
Filipp.