RFR 9: 8150346 : java/lang/ProcessHandle/Infotest.java failed: startTime after process spawn completed

[Roger Riggs]

Please review a test fix to resolve a timing race with the start time of 
a spawned process.

Webrev:
  http://cr.openjdk.java.net/~rriggs/webrev-start-8150346/
Jira:
   https://bugs.openjdk.java.net/browse/JDK-8150346

Thanks, Roger