Add "Find Usages" tests for nested/inner classes and objects

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

@@ -0,0 +1,31 @@
+public class KOuter: Outer() {
+    public inner class X(bar: String? = (this@KOuter : Outer).A().bar): Outer.A() {
+        var next: Outer.A? = (this@KOuter : Outer).A()
+        val myBar: String? = (this@KOuter : Outer).A().bar
+
+        {
+            (this@KOuter : Outer).A().bar = ""
+        }
+
+        fun foo(a: Outer.A) {
+            val aa: Outer.A = a
+            aa.bar = ""
+        }
+
+        fun getNext(): Outer.A? {
+            return next
+        }
+
+        public override fun foo() {
+            super<Outer.A>.foo()
+        }
+    }
+}
+
+fun KOuter.X.bar(a: Outer.A = Outer().A()) {
+
+}
+
+fun Any.toA(): Outer.A? {
+    return if (this is Outer.A) this as Outer.A else null
+}