Windup 210: Simplification of Classification and Hint

Not sure if you will like the classification simplification, it is quite hacky.
However, I seperated both simplification to two different commits.

Both of them are now able to use the "pass variableName from Iteration" simplification.
Pondering, how about dropping Iteration entirely,

.addRule()
.forEach( JavaClass.references("org.jboss.forge.furnace.*").at(TypeReferenceLocation.IMPORT) )
.perform(
        Classification.classifyAs("Furnace Service") .with(...),
        Hint.in("#{ref.file}").at("ref").withText(...),
        Hint.havingText(...).withEffort(8)
)