Allow resolve class declarations in class objects

Use INACCESSIBLE_OUTER_CLASS_EXPRESSION error for marking already resolved elements

 #KT-3261 Fixed

compiler/testData/diagnostics/tests/inner/innerErrorForClassObjects.kt

@@ -0,0 +1,26 @@
+open class SomeClass<T>
+class TestSome<P> {
+    class object : SomeClass<<!INACCESSIBLE_OUTER_CLASS_EXPRESSION!>P<!>>() {
+    }
+}
+
+class Test {
+    class object : <!INACCESSIBLE_OUTER_CLASS_EXPRESSION!>InnerClass()<!> {
+        val a = object: <!INACCESSIBLE_OUTER_CLASS_EXPRESSION!>InnerClass()<!> {
+        }
+
+        fun more(): InnerClass {
+            val b = <!INACCESSIBLE_OUTER_CLASS_EXPRESSION!>InnerClass()<!>
+
+            val <!UNUSED_VARIABLE!>testVal<!> = <!INACCESSIBLE_OUTER_CLASS_EXPRESSION!>inClass<!>
+            <!INACCESSIBLE_OUTER_CLASS_EXPRESSION!>foo()<!>
+
+            return b
+        }
+    }
+
+    val inClass = 12
+    fun foo() {}
+
+    open inner class InnerClass
+}