[9] RFR for 8151714: [TEST] add a manual test test for JOptionPane dialog multires. icons

[Alexander Stepanov]

Hello,

Could you please review the fix
http://cr.openjdk.java.net/~avstepan/8151714/webrev.00/
for
https://bugs.openjdk.java.net/browse/JDK-8151714
- just a single test added.

Thanks,
Alexander