[8u-dev] RFR 8150070: TESTBUG: com/sun/jdi tests fail on Cygwin but pass on MKS

[Konstantin Shefov]

Hello

Please review a test bug fix.
The test fails because Cygwin PID returned by "$!" and Windows PID 
returned by "tasklist" are not the same.
Need to use cygwin "ps".

Bug: https://bugs.openjdk.java.net/browse/JDK-8150070
Webrev: http://cr.openjdk.java.net/~kshefov/8150070/webrev

Thanks
-Konstantin