RFR: 8081536 : (process) remove unreliable ScaleTest from process tests

[Roger Riggs]

Please review the removal of the java/lang/ProcessHandle/ScaleTest for 
ProcessHandles.
It is not appropriate for regression testing and does not run reliably.
It was inadvertently included in the commit.

Webrev:
http://bussund0416.us.oracle.com/~rriggs/webrev/webrev-scaletest-remove-8081536/
Issue:
8081536 <https://bugs.openjdk.java.net/browse/JDK-8081536>: (process) 
remove unreliable ScaleTest from process tests

Thanks, Roger