Add test for smart step into in method with default args

#KT-4803 In Progress

idea/testData/debugger/tinyApp/src/stepping/custom/smartStepIntoFunWithDefaultArgs.kt

@@ -0,0 +1,33 @@
+package smartStepIntoFunWithDefaultArgs
+
+fun Int.foo(a: Int = 1) {
+    val a = 1
+}
+
+fun Int.foo(a: String, b: Int = 1) {
+    val a = 1
+}
+
+fun bar() = 1
+
+fun main(args: Array<String>) {
+    // SMART_STEP_INTO_BY_INDEX: 2
+    // RESUME: 1
+    //Breakpoint!
+    bar().foo(2)
+
+    // SMART_STEP_INTO_BY_INDEX: 2
+    // RESUME: 1
+    //Breakpoint!
+    bar().foo()
+
+    // SMART_STEP_INTO_BY_INDEX: 2
+    // RESUME: 1
+    //Breakpoint!
+    bar().foo("1", 2)
+
+    // SMART_STEP_INTO_BY_INDEX: 2
+    // RESUME: 1
+    //Breakpoint!
+    bar().foo("1")
+}