RFR: JDK-824662: Refactor JLinkBundlerHelper and StandardBundlerParam classes

[Alexey Semenyuk]

Please review fix [2] for jpackage bug [1].

Move functionality to collect data about app (main class name, main jar, 
module name, etc) from JLinkBundlerHelper and StandardBundlerParam 
classes in dedicated LauncherData class.
Remove ArgAction, ModFile and RelativeFileSet classes as they are not 
needed any more after refactoring of JLinkBundlerHelper and 
StandardBundlerParam classes.
Clean unused code.

- Alexey

[1] https://bugs.openjdk.java.net/browse/JDK-8246624

[2] http://cr.openjdk.java.net/~asemenyuk/8246624/webrev.00