RFR 9: 8081566: java/lang/ProcessHandle/InfoTest.java failed on case sensitive command

Please review this testbug fix to correctly check the reported command name. On Windows the command filename may differ only by case and should be checked to see if they are the same file, not just the same string. webrev: http://cr.openjdk.java.net/~rriggs/webrev-infotest-8081566/ Issue: https://bugs.openjdk.java.net/browse/JDK-8081566 Thanks, Roger