Added KT-4549 SwapBinaryExpression Intention

idea/testData/intentions/swapBinaryExpression/infixFunction.kt

@@ -0,0 +1,8 @@
+// IS_APPLICABLE: false
+class Foo() {
+    fun cat(x: Int): Int {return x}
+}
+
+fun main() {
+    val catter = Foo() c<caret>at 5
+}