Change Signature: val/var parameter support

idea/testData/refactoring/changeSignature/ChangeClassParameterBefore.kt

@@ -0,0 +1,21 @@
+open class A(open var <caret>p: Int)
+
+class B(override var p: Int): A(p)
+
+class C: A(0) {
+    override var p: Int = 1
+}
+
+fun test() {
+    val t1 = A(0).p
+    A(0).p = 1
+
+    val t2 = B(0).p
+    B(0).p = 2
+
+    val t3 = C().p
+    C().p = 3
+
+    val t4 = J().getP()
+    J().setP(4)
+}