SLING-3241 Unwrapped any wrapped objects before returning the result from script evaluation. Also adapted the ScriptableResourceTest becaused "undefined" is returned as null now. The test evaluates a comparison to the undefined value and verifies the result is true.
sling/trunk/bundles/scripting/javascript/src/main/java/org/apache/sling/scripting/javascript/internal/RhinoJavaScriptEngine.java