Lenient for BDD added

Add package info to satisfy javadoc plugin and exclude it to avoid adding a package to the module.

Move the mock method dispatcher to a dedicated package to avoid class loaders to skip the bootstrap class loader if Mockito is loaded as an automatic module due to the class's package being assigned to Mockito already.

Work-around possible JVM bug by specifying a class loader for the injected class explicitly. Add tests to check behavior of using Mockito as automatic module.