RFR 4916621: update those still using JDIScaffold to use TestScaffold instead

[Paru Somashekar]

Hi,

Please review fix for JDK-4916621

These are the remaining tests from the list that needed to be updated.

Bug : JDK-4916621 <https://bugs.openjdk.java.net/browse/JDK-4916621>
Webrev : http://cr.openjdk.java.net/~psomashe/4916621/webrev/ 
<http://cr.openjdk.java.net/%7Epsomashe/4916621/webrev/>

The updated tests ran successfully with Mach5.

thanks,
Paru.
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