RFR 8060026: Update test/tools/launcher tests to eliminate dependency on sun.tools.jar.Main

[Amy Lu]

Some test/tools/launcher tests have dependency on sun.tools.jar.Main
The dependency actually comes from TestHelper.java
This fix is to remove above internal JDK API dependency from the tests.

bug: https://bugs.openjdk.java.net/browse/JDK-8060026
webrev: http://cr.openjdk.java.net/~weijun/8060026/webrev.00/

Thanks,
Amy