Introduce Variable: Do not compare explicit receivers using ReceiverValue

#KT-5319 Fixed

idea/testData/refactoring/introduceVariable/OneExplicitReceiver.kt

@@ -0,0 +1,9 @@
+fun main(args: Array<String>) {
+    val myA = A()
+    println(<selection>myA.prop</selection>)
+    println(myA.prop)
+}
+
+class A {
+    val prop = 1
+}