RFR: JDK-8245202: Convert existing jpackage tests to newer form.

[Andy Herrick]

Please review the fix to issue [1] at [2].

The change removes all the old form helper tests and converts the 6 
remaining tests that used the old helpers into 4 new tests using the new 
helpers.

[1] - https://bugs.openjdk.java.net/browse/JDK-8245202

[2] - http://cr.openjdk.java.net/~herrick/8245202/webrev.01/

/Andy