Fix for JDK-8169043 : The task bar icon color is not blue

[Ajit Ghaisas]

Hi,

    Request you to review a test fix.

    Bug :   https://bugs.openjdk.java.net/browse/JDK-8169043
    Fix : http://cr.openjdk.java.net/~aghaisas/8169043/webrev.0/

Changes are :
    1) Test is made to be run on Windows only.
    2) Pass/Fail status was not reported correctly. It has been corrected now.
    
Regards,
Ajit