RFR 8136933: Additional tests for Solaris SO_FLOW_SLA socket option in JDK 9

[Svetlana Nikandrova]

Hello,

please review additional test for Solaris SO_FLOW_SLA socket option.
Test checks that SO_FLOW_SLA option is supported on Solaris 11.2+ and 
not supported on other platforms.

http://cr.openjdk.java.net/~snikandrova/8136933/webrev.00/ 
<http://cr.openjdk.java.net/%7Esnikandrova/8136933/webrev.00/>

Thank you,
Svetlana