Fix caching of light class data for nested classes

idea/testData/findUsages/java/findJavaClassUsages/JKInterfaceDerivedInnerObjects.1.kt

@@ -0,0 +1,9 @@
+class Outer {
+    public open class T: A
+
+    public object O1: A()
+
+    class Inner {
+        public object O2: T()
+    }
+}