Fix compilation.

- rename isFinal extension property to avoid ambiguity with synthetic property in DeserializedClassTypeConstructor
- add explicit parameter to lambda File.listFiles
- return true from lambda Query.forEach

core/descriptor.loader.java/src/org/jetbrains/kotlin/load/java/lazy/descriptors/LazyJavaClassDescriptor.kt

@@ -206,7 +206,7 @@ class LazyJavaClassDescriptor(
 
         override fun getAnnotations() = Annotations.EMPTY
 
-        override fun isFinal(): Boolean = isFinal
+        override fun isFinal(): Boolean = isFinalClass
 
         override fun isDenotable() = true