Provide Automatic-Module-Name

[Florian Kirmaier]

Setting a ModuleName should ease some JavaModuleSystem interactions.
The jar names of scala-jars are especially problematic.
java.lang.IllegalArgumentException: scalaj.http.2.12: Invalid module name: '2' is not a Java identifier
The scala version is interpreted as a module name.
Specifying Automatic-Module-Name should make some interactions much easier.