KT-2725 No completion in properties initializers and accessors

#KT-2725 Fixed

idea/testData/completion/basic/InClassPropertyAccessor.kt

@@ -0,0 +1,9 @@
+class Test(val testParam : Int) {
+  val x : Int get() {
+      val test = 12
+      return te<caret>
+  }
+}
+
+// EXIST: test
+// EXIST: testParam

idea/testData/completion/basic/InGlobalPropertyInitializer.kt

@@ -0,0 +1,6 @@
+val testing = 12
+val test = "Hello"
+
+val more = test<caret>
+
+// EXIST: test, testing

idea/testData/completion/basic/InInitializerInPropertyAccessor.kt

@@ -0,0 +1,11 @@
+val testGlobal = 12
+
+val test : Int get() {
+    class SomeMore(testParam : Int) {
+        {
+            tes<caret>
+        }
+    }
+}
+
+// EXIST: testGlobal, test, testParam